Xue jiufei [Wed, 11 Sep 2013 21:19:57 +0000 (14:19 -0700)]
ocfs2/dlm: force clean refmap when doing local cleanup
dlm_do_local_recovery_cleanup() should force clean refmap if the owner of
lockres is UNKNOWN. Otherwise node may hang when umounting filesystems.
Here's the situation:
Node1 Node2
dlmlock()
-> dlm_get_lock_resource()
send DLM_MASTER_REQUEST_MSG to
other nodes.
trying to master this lockres,
return MAYBE.
selected as the master of lockresA,
set mle->master to Node1,
and do assert_master,
send DLM_ASSERT_MASTER_MSG to Node2.
Node 2 has interest on lockresA
and return
DLM_ASSERT_RESPONSE_MASTERY_REF
then something happened and
Node2 crashed.
Receiving DLM_ASSERT_RESPONSE_MASTERY_REF, set Node2 into refmap, and keep
sending DLM_ASSERT_MASTER_MSG to other nodes
o2hb found node2 down, calling dlm_hb_node_down() -->
dlm_do_local_recovery_cleanup() the master of lockresA is still UNKNOWN,
no need to call dlm_free_dead_locks().
Set the master of lockresA to Node1, but Node2 stills remains in refmap.
When Node1 umount, it found that the refmap of lockresA is not empty and
attempted to migrate it to Node2, But Node2 is already down, so umount
hang, trying to migrate lockresA again and again.
Signed-off-by: joyce <xuejiufei@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Younger Liu [Wed, 11 Sep 2013 21:19:56 +0000 (14:19 -0700)]
ocfs2: free meta_ac and data_ac when ocfs2_start_trans fails in ocfs2_xattr_set()
In ocfs2_xattr_set(), if ocfs2_start_trans failed, meta_ac and data_ac
should be free. Otherwise, It would lead to a memory leak.
Signed-off-by: Younger Liu <younger.liu@huawei.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Joseph Qi [Wed, 11 Sep 2013 21:19:55 +0000 (14:19 -0700)]
ocfs2: add the missing return value check of ocfs2_xattr_get_clusters
In ocfs2_xattr_value_attach_refcount(), if error occurs when calling
ocfs2_xattr_get_clusters(), it will go with unexpected behavior since
local variables p_cluster, num_clusters and ext_flags are declared without
initialization.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Acked-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jie Liu [Wed, 11 Sep 2013 21:19:53 +0000 (14:19 -0700)]
ocfs2: fix a memory leak in __ocfs2_move_extents()
The ocfs2 path is not properly freed which leads to a memory leak at
__ocfs2_move_extents().
This patch stops the leaks of the ocfs2_path structure.
Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Reviewed-by: Younger Liu <younger.liu@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Joseph Qi [Wed, 11 Sep 2013 21:19:52 +0000 (14:19 -0700)]
ocfs2: add missing return value check of ocfs2_get_clusters()
In ocfs2_attach_refcount_tree() and ocfs2_duplicate_extent_list(), if
error occurs when calling ocfs2_get_clusters(), it will go with
unexpected behavior as local variables p_cluster, num_clusters and
ext_flags are declared without initialization.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Joseph Qi [Wed, 11 Sep 2013 21:19:51 +0000 (14:19 -0700)]
ocfs2: clean up dead code in ocfs2_acl_from_xattr()
In ocfs2_acl_from_xattr(), if size is less than sizeof(struct
posix_acl_entry), it returns ERR_PTR(-EINVAL) directly. Then assign (size
/ sizeof(struct posix_acl_entry)) to count which will be at least 1, that
means the following branch (count < 0) and (count == 0) will never be
true.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dong Fang [Wed, 11 Sep 2013 21:19:50 +0000 (14:19 -0700)]
ocfs2: use list_for_each_entry() instead of list_for_each()
[dan.carpenter@oracle.com: fix up some NULL dereference bugs]
Signed-off-by: Dong Fang <yp.fangdong@gmail.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jeff Liu <jeff.liu@oracle.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Sunil Mushran [Wed, 11 Sep 2013 21:19:49 +0000 (14:19 -0700)]
fs/ocfs2/cluster/tcp.c: fix possible null pointer dereferences
Fix some possible null pointer dereferences that were detected by the
static code analyser, smatch.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Reported-by: Guozhonghua <guozhonghua@h3c.com>
Cc: Sunil Mushran <sunil.mushran@gmail.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Younger Liu [Wed, 11 Sep 2013 21:19:47 +0000 (14:19 -0700)]
ocfs2: ac_bits_wanted should be local_alloc_bits when returns -ENOSPC
There is an issue in reserving and claiming space for localalloc, When
localalloc space is not enough, it would claim space from global_bitmap.
And if there is not enough free space in global_bitmap, the size of
claiming space would set to half of orignal size and retry.
The issue is as follows: osb->local_alloc_bits is set to half of orignal
size in ocfs2_recalc_la_window(), but ac->ac_bits_wanted is set to
osb->local_alloc_default_bits which is not changed. localalloc always
reserves and claims local_alloc_default_bits space and returns ENOSPC.
So, ac->ac_bits_wanted should be osb->local_alloc_bits which would be
changed.
Signed-off-by: Younger Liu <younger.liu@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Jeff Liu <jeff.liu@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Xue jiufei [Wed, 11 Sep 2013 21:19:46 +0000 (14:19 -0700)]
ocfs2: dlm_request_all_locks() should deal with the status sent from target node
dlm_request_all_locks() should deal with the status sent from target node
if DLM_LOCK_REQUEST_MSG is sent successfully, or recovery master will fall
into endless loop, waiting for other nodes to send locks and
DLM_RECO_DATA_DONE_MSG to me.
NodeA NodeB
selected as recovery master
dlm_remaster_locks()
->dlm_request_all_locks()
send DLM_LOCK_REQUEST_MSG to nodeA
It happened that NodeA cannot alloc memory when it processes this
message. dlm_request_all_locks_handler() do not queue
dlm_request_all_locks_worker and returns -ENOMEM. It will never send
locks and DLM_RECO_DATA_DONE_MSG to NodeB.
NodeB do not deal with the status
sent from nodeA, and will fall in
endless loop waiting for the
recovery state of NodeA to be
changed.
Signed-off-by: joyce <xuejiufei@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Jeff Liu <jeff.liu@oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Junxiao Bi [Wed, 11 Sep 2013 21:19:45 +0000 (14:19 -0700)]
ocfs2: use i_size_read() to access i_size
Though ocfs2 uses inode->i_mutex to protect i_size, there are both
i_size_read/write() and direct accesses. Clean up all direct access to
eliminate confusion.
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Jie Liu <jeff.liu@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Younger Liu [Wed, 11 Sep 2013 21:19:44 +0000 (14:19 -0700)]
ocfs2: lighten up allocate transaction
The issue scenario is as following:
When fallocating a very large disk space for a small file,
__ocfs2_extend_allocation attempts to get a very large transaction. For
some journal sizes, there may be not enough room for this transaction,
and the fallocate will fail.
The patch below extends & restarts the transaction as necessary while
allocating space, and should work with even the smallest journal. This
patch refers ext4 resize.
Test:
# mkfs.ocfs2 -b 4K -C 32K -T datafiles /dev/sdc
...(jounral size is 32M)
# mount.ocfs2 /dev/sdc /mnt/ocfs2/
# touch /mnt/ocfs2/1.log
# fallocate -o 0 -l 400G /mnt/ocfs2/1.log
fallocate: /mnt/ocfs2/1.log: fallocate failed: Cannot allocate memory
# tail -f /var/log/messages
[ 7372.278591] JBD: fallocate wants too many credits (2051 > 2048)
[ 7372.278597] (fallocate,6438,0):__ocfs2_extend_allocation:709 ERROR: status = -12
[ 7372.278603] (fallocate,6438,0):ocfs2_allocate_unwritten_extents:1504 ERROR: status = -12
[ 7372.278607] (fallocate,6438,0):__ocfs2_change_file_space:1955 ERROR: status = -12
^C
With this patch, the test works well.
Signed-off-by: Younger Liu <younger.liu@huawei.com>
Cc: Jie Liu <jeff.liu@oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jingoo Han [Wed, 11 Sep 2013 21:19:43 +0000 (14:19 -0700)]
drivers/iommu: remove unnecessary platform_set_drvdata()
The driver core clears the driver data to NULL after device_release or
on probe failure. Thus, it is not needed to manually clear the device
driver data to NULL.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: David Brown <davidb@codeaurora.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Suman Anna <s-anna@ti.com>
Acked-by: Libo Chen <libo.chen@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Paul Bolle [Wed, 11 Sep 2013 21:19:42 +0000 (14:19 -0700)]
drivers/video/acornfb.c: remove dead code
acornfb checks for HAS_VIDC while support for that macro was removed in
v2.6.23 (when the arm26 port was removed). So we can remove a bit of
dead code.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Oleg Nesterov [Wed, 11 Sep 2013 21:19:41 +0000 (14:19 -0700)]
fork: unify and tighten up CLONE_NEWUSER/CLONE_NEWPID checks
do_fork() denies CLONE_THREAD | CLONE_PARENT if NEWUSER | NEWPID.
Then later copy_process() denies CLONE_SIGHAND if the new process will
be in a different pid namespace (task_active_pid_ns() doesn't match
current->nsproxy->pid_ns).
This looks confusing and inconsistent. CLONE_NEWPID is very similar to
the case when ->pid_ns was already unshared, we want the same
restrictions so copy_process() should also nack CLONE_PARENT.
And it would be better to deny CLONE_NEWUSER && CLONE_SIGHAND as well
just for consistency.
Kill the "CLONE_NEWUSER | CLONE_NEWPID" check in do_fork() and change
copy_process() to do the same check along with ->pid_ns check we already
have.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Colin Walters <walters@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Oleg Nesterov [Wed, 11 Sep 2013 21:19:40 +0000 (14:19 -0700)]
pidns: kill the unnecessary CLONE_NEWPID in copy_process()
Commit
8382fcac1b81 ("pidns: Outlaw thread creation after
unshare(CLONE_NEWPID)") nacks CLONE_NEWPID if the forking process
unshared pid_ns. This is correct but unnecessary, copy_pid_ns() does
the same check.
Remove the CLONE_NEWPID check to cleanup the code and prepare for the
next change.
Test-case:
static int child(void *arg)
{
return 0;
}
static char stack[16 * 1024];
int main(void)
{
pid_t pid;
assert(unshare(CLONE_NEWUSER | CLONE_NEWPID) == 0);
pid = clone(child, stack + sizeof(stack) / 2,
CLONE_NEWPID | SIGCHLD, NULL);
assert(pid < 0 && errno == EINVAL);
return 0;
}
clone(CLONE_NEWPID) correctly fails with or without this change.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Colin Walters <walters@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Oleg Nesterov [Wed, 11 Sep 2013 21:19:38 +0000 (14:19 -0700)]
pidns: fix vfork() after unshare(CLONE_NEWPID)
Commit
8382fcac1b81 ("pidns: Outlaw thread creation after
unshare(CLONE_NEWPID)") nacks CLONE_VM if the forking process unshared
pid_ns, this obviously breaks vfork:
int main(void)
{
assert(unshare(CLONE_NEWUSER | CLONE_NEWPID) == 0);
assert(vfork() >= 0);
_exit(0);
return 0;
}
fails without this patch.
Change this check to use CLONE_SIGHAND instead. This also forbids
CLONE_THREAD automatically, and this is what the comment implies.
We could probably even drop CLONE_SIGHAND and use CLONE_THREAD, but it
would be safer to not do this. The current check denies CLONE_SIGHAND
implicitely and there is no reason to change this.
Eric said "CLONE_SIGHAND is fine. CLONE_THREAD would be even better.
Having shared signal handling between two different pid namespaces is
the case that we are fundamentally guarding against."
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Colin Walters <walters@redhat.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrew Morton [Wed, 11 Sep 2013 21:19:37 +0000 (14:19 -0700)]
include/linux/smp.h:on_each_cpu(): switch back to a C function
Revert commit
c846ef7deba2 ("include/linux/smp.h:on_each_cpu(): switch
back to a macro"). It turns out that the problematic linux/irqflags.h
include was fixed within ia64 and mn10300.
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: David Daney <david.daney@cavium.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Wed, 11 Sep 2013 15:36:03 +0000 (08:36 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/s390/linux
Pull more s390 updates from Heiko Carstens:
"This includes one bpf/jit bug fix where the jit compiler could
sometimes write generated code out of bounds of the allocated memory
area.
The rest of the patches are only cleanups and minor improvements"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/irq: reduce size of external interrupt handler hash array
s390/compat,uid16: use current_cred()
s390/ap_bus: use and-mask instead of a cast
s390/ftrace: avoid pointer arithmetics with function pointers
s390: make various functions static, add declarations to header files
s390/compat signal: add couple of __force annotations
s390/mm: add __releases()/__acquires() annotations to gmap_alloc_table()
s390: keep Kconfig sorted
s390/irq: rework irq subclass handling
s390/irq: use hlists for external interrupt handler array
s390/dumpstack: convert print_symbol to %pSR
s390/perf: Remove print_hex_dump_bytes() debug output
s390: update defconfig
s390/bpf,jit: fix address randomization
Linus Torvalds [Wed, 11 Sep 2013 15:34:25 +0000 (08:34 -0700)]
Merge branch 'kconfig' of git://git./linux/kernel/git/mmarek/kbuild
Pull kconfig updates from Michal Marek:
"This is the kconfig part of kbuild for v3.12-rc1:
- post-3.11 search code fixes and micro-optimizations
- CONFIG_MODULES is no longer a special case; this is needed to
eventually fix the bug that using KCONFIG_ALLCONFIG breaks
allmodconfig
- long long is used to store hex and int values
- make silentoldconfig no longer warns when a symbol changes from
tristate to bool (it's a job for make oldconfig)
- scripts/diffconfig updated to work with newer Pythons
- scripts/config does not rely on GNU sed extensions"
* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
kconfig: do not allow more than one symbol to have 'option modules'
kconfig: regenerate bison parser
kconfig: do not special-case 'MODULES' symbol
diffconfig: Update script to support python versions 2.5 through 3.3
diffconfig: Gracefully exit if the default config files are not present
modules: do not depend on kconfig to set 'modules' option to symbol MODULES
kconfig: silence warning when parsing auto.conf when a symbol has changed type
scripts/config: use sed's POSIX interface
kconfig: switch to "long long" for sanity
kconfig: simplify symbol-search code
kconfig: don't allocate n+1 elements in temporary array
kconfig: minor style fixes in symbol-search code
kconfig/[mn]conf: shorten title in search-box
kconfig: avoid multiple calls to strlen
Documentation/kconfig: more concise and straightforward search explanation
Linus Torvalds [Wed, 11 Sep 2013 05:58:14 +0000 (22:58 -0700)]
Merge tag 'for-v3.12' of git://git.infradead.org/battery-2.6
Pull battery/power supply driver updates from Anton Vorontsov:
"New drivers:
- APM X-Gene system reboot driver by Feng Kan and Loc Ho (APM).
- Qualcomm MSM reboot/poweroff driver by Abhimanyu Kapur (Codeaurora).
- Texas Instruments BQ24190 charger driver by Mark A. Greer (Animal
Creek Technologies).
- Texas Instruments TWL4030 MADC battery driver by Lukas Märdian and
Marek Belisko (Golden Delicious Computers). The driver is used on
Freerunner GTA04 phones.
Highlighted fixes and improvements:
- Suspend/wakeup logic improvements: power supply objects will block
system suspend until all power supply events are processed. Thanks
to Zoran Markovic (Linaro), Arve Hjonnevag and Todd Poynor (Google)"
* tag 'for-v3.12' of git://git.infradead.org/battery-2.6:
rx51_battery: Fix channel number when reading adc value
power: Add twl4030_madc battery driver.
bq24190_charger: Workaround SS definition problem on i386 builds
power_supply: Prevent suspend until power supply events are processed
vexpress-poweroff: Should depend on the required infrastructure
twl4030-charger: Fix compiler warning with regulator_enable()
rx51_battery: Replace hardcoded channels values.
bq24190_charger: Add support for TI BQ24190 Battery Charger
ab8500-charger: We print an unintended error message
max8925_power: Fix missing of_node_put
power_supply: Replace strict_strtol() with kstrtol()
power: Add APM X-Gene system reboot driver
power_supply: tosa_battery: Get rid of irq_to_gpio usage
power supply: collie_battery: Convert to use dev_pm_ops
power_supply: Make goldfish_battery depend on GOLDFISH || COMPILE_TEST
power: reset: Add msm restart support
MAINTAINERS: drivers/power: add entry for SmartReflex AVS drivers
Linus Torvalds [Wed, 11 Sep 2013 03:24:39 +0000 (20:24 -0700)]
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc
Pull powerpc fixes from Ben Herrenschmidt:
"Here are a handful of small powerpc fixes.
A couple of section mismatches (always worth fixing), a missing export
of a new symbol causing build failures of modules, a page fault
deadlock fix (interestingly that bug has been around for a LONG time,
though it seems to be more easily triggered by KVM) and fixing pseries
default idle loop in the absence of the cpuidle drivers (such as
during boot)"
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc: Default arch idle could cede processor on pseries
fbdev/ps3fb: Fix section mismatch warning for ps3fb_probe
powerpc: Fix section mismatch warning for prom_rtas_call
powerpc: Fix possible deadlock on page fault
powerpc: Export cpu_to_chip_id() to fix build error
Linus Torvalds [Wed, 11 Sep 2013 03:07:04 +0000 (20:07 -0700)]
Merge tag 'stable/for-linus-3.12-rc0-tag-two' of git://git./linux/kernel/git/xen/tip
Pull Xen bug-fixes from Konrad Rzeszutek Wilk:
"This pull I usually do after rc1 is out but because we have a nice
amount of fixes, some bootup related fixes for ARM, and it is early in
the cycle we figured to do it now to help with tracking of potential
regressions.
The simple ones are the ARM ones - one of the patches fell through the
cracks, other fixes a bootup issue (unconditionally using Xen
functions). Then a fix for a regression causing preempt count being
off (patch causing this went in v3.12).
Lastly are the fixes to make Xen PVHVM guests use PV ticketlocks (Xen
PV already does).
The enablement of that was supposed to be part of the x86 spinlock
merge in commit
816434ec4a67 ("The biggest change here are
paravirtualized ticket spinlocks (PV spinlocks), which bring a nice
speedup on various benchmarks...") but unfortunatly it would cause
hang when booting Xen PVHVM guests. Yours truly got all of the bugs
fixed last week and they (six of them) are included in this pull.
Bug-fixes:
- Boot on ARM without using Xen unconditionally
- On Xen ARM don't run cpuidle/cpufreq
- Fix regression in balloon driver, preempt count warnings
- Fixes to make PVHVM able to use pv ticketlock.
- Revert Xen PVHVM disabling pv ticketlock (aka, re-enable pv ticketlocks)"
* tag 'stable/for-linus-3.12-rc0-tag-two' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/spinlock: Don't use __initdate for xen_pv_spin
Revert "xen/spinlock: Disable IRQ spinlock (PV) allocation on PVHVM"
xen/spinlock: Don't setup xen spinlock IPI kicker if disabled.
xen/smp: Update pv_lock_ops functions before alternative code starts under PVHVM
xen/spinlock: We don't need the old structure anymore
xen/spinlock: Fix locking path engaging too soon under PVHVM.
xen/arm: disable cpuidle and cpufreq when linux is running as dom0
xen/p2m: Don't call get_balloon_scratch_page() twice, keep interrupts disabled for multicalls
ARM: xen: only set pm function ptrs for Xen guests
Linus Torvalds [Wed, 11 Sep 2013 03:05:57 +0000 (20:05 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"Daniel had some fixes queued up, that were delayed, the stolen memory
ones and vga arbiter ones are quite useful, along with his usual bunch
of stuff, nothing for HSW outputs yet.
The one nouveau fix is for a regression I caused with the poweroff stuff"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (30 commits)
drm/nouveau: fix oops on runtime suspend/resume
drm/i915: Delay disabling of VGA memory until vgacon->fbcon handoff is done
drm/i915: try not to lose backlight CBLV precision
drm/i915: Confine page flips to BCS on Valleyview
drm/i915: Skip stolen region initialisation if none is reserved
drm/i915: fix gpu hang vs. flip stall deadlocks
drm/i915: Hold an object reference whilst we shrink it
drm/i915: fix i9xx_crtc_clock_get for multiplied pixels
drm/i915: handle sdvo input pixel multiplier correctly again
drm/i915: fix hpd work vs. flush_work in the pageflip code deadlock
drm/i915: fix up the relocate_entry refactoring
drm/i915: Fix pipe config warnings when dealing with LVDS fixed mode
drm/i915: Don't call sg_free_table() if sg_alloc_table() fails
i915: Update VGA arbiter support for newer devices
vgaarb: Fix VGA decodes changes
vgaarb: Don't disable resources that are not owned
drm/i915: Pin pages whilst mapping the dma-buf
drm/i915: enable trickle feed on Haswell
x86: add early quirk for reserving Intel graphics stolen memory v5
drm/i915: split PCI IDs out into i915_drm.h v4
...
Linus Torvalds [Wed, 11 Sep 2013 03:04:59 +0000 (20:04 -0700)]
Merge branch 'nfsd-next' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"This was a very quiet cycle! Just a few bugfixes and some cleanup"
* 'nfsd-next' of git://linux-nfs.org/~bfields/linux:
rpc: let xdr layer allocate gssproxy receieve pages
rpc: fix huge kmalloc's in gss-proxy
rpc: comment on linux_cred encoding, treat all as unsigned
rpc: clean up decoding of gssproxy linux creds
svcrpc: remove unused rq_resused
nfsd4: nfsd4_create_clid_dir prints uninitialized data
nfsd4: fix leak of inode reference on delegation failure
Revert "nfsd: nfs4_file_get_access: need to be more careful with O_RDWR"
sunrpc: prepare NFS for 2038
nfsd4: fix setlease error return
nfsd: nfs4_file_get_access: need to be more careful with O_RDWR
Linus Torvalds [Wed, 11 Sep 2013 03:03:54 +0000 (20:03 -0700)]
Merge tag 'hwmon-for-linus' of git://git./linux/kernel/git/groeck/linux-staging
Pull hwmon cleanups from Guenter Roeck:
"Minor cleanup in ina2xx and hwmon-vid drivers; no functional changes"
* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (ina2xx) Remove casting the return value which is a void pointer
hwmon: (hwmon-vid) Add __maybe_unused attribute to dummy variable
Linus Torvalds [Wed, 11 Sep 2013 02:43:23 +0000 (19:43 -0700)]
Merge branch 'x86/jumplabel' of git://git./linux/kernel/git/tip/tip
Pull x86 jumplabel changes from Peter Anvin:
"One more x86 tree for this merge window. This tree improves the
handling of jump labels, so that most of the time we don't have to do
a massive initial patching run.
Furthermore, we will error out of the jump label is not what is
expected, eg if it has been corrupted or tampered with"
* 'x86/jumplabel' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/jump-label: Show where and what was wrong on errors
x86/jump-label: Add safety checks to jump label conversions
x86/jump-label: Do not bother updating nops if they are correct
x86/jump-label: Use best default nops for inital jump label calls
Vaidyanathan Srinivasan [Thu, 5 Sep 2013 18:55:06 +0000 (00:25 +0530)]
powerpc: Default arch idle could cede processor on pseries
When adding cpuidle support to pSeries, we introduced two
regressions:
- The new cpuidle backend driver only works under hypervisors
supporting the "SLPLAR" option, which isn't the case of the
old POWER4 hypervisor and the HV "light" used on js2x blades
- The cpuidle driver registers fairly late, meaning that for
a significant portion of the boot process, we end up having
all threads spinning. This slows down the boot process and
increases the overall resource usage if the hypervisor has
shared processors.
This fixes both by implementing a "default" idle that will cede
to the hypervisor when possible, in a very simple way without
all the bells and whisles of cpuidle.
Reported-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Acked-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org>
Vladimir Murzin [Tue, 10 Sep 2013 16:46:30 +0000 (18:46 +0200)]
fbdev/ps3fb: Fix section mismatch warning for ps3fb_probe
While cross-building for PPC64 I've got
WARNING: drivers/video/built-in.o(.text+0x9f9ca): Section mismatch in
reference from the function .ps3fb_probe() to th e variable
.init.data:ps3fb_fix The function .ps3fb_probe() references the
variable __initdata ps3fb_fix. This is often because .ps3fb_probe
lacks a __initdata annotation or the annotation of ps3fb_fix is wrong.
WARNING: drivers/video/built-in.o(.text+0x9f9d2): Section mismatch in
reference from the function .ps3fb_probe() to the variable
.init.data:ps3fb_fix The function .ps3fb_probe() references the
variable __initdata ps3fb_fix. This is often because .ps3fb_probe
lacks a __initdata annotation or the annotation of ps3fb_fix is wrong.
WARNING: drivers/built-in.o(.text+0xe222a): Section mismatch in
reference from the function .ps3fb_probe() to the variable
.init.data:ps3fb_fix The function .ps3fb_probe() references the
variable __initdata ps3fb_fix. This is often because .ps3fb_probe
lacks a __initdata annotation or the annotation of ps3fb_fix is wrong.
WARNING: drivers/built-in.o(.text+0xe2232): Section mismatch in
reference from the function .ps3fb_probe() to the variable
.init.data:ps3fb_fix The function .ps3fb_probe() references the
variable __initdata ps3fb_fix. This is often because .ps3fb_probe
lacks a __initdata annotation or the annotation of ps3fb_fix is wrong.
WARNING: vmlinux.o(.text+0x561d4a): Section mismatch in reference from
the function .ps3fb_probe() to the variable .init.data:ps3fb_fix The
function .ps3fb_probe() references the variable __initdata ps3fb_fix.
This is often because .ps3fb_probe lacks a __initdata annotation or
the annotation of ps3fb_fix is wrong.
Mismatch was introduced with
48c68c4f "Drivers: video: remove __dev*
attributes."
Remove __init data annotation from ps3fb_fix.
Signed-off-by: Vladimir Murzin <murzin.v@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Vladimir Murzin [Tue, 10 Sep 2013 16:42:07 +0000 (18:42 +0200)]
powerpc: Fix section mismatch warning for prom_rtas_call
While cross-building for PPC64 I've got
WARNING: vmlinux.o(.text.unlikely+0x1ba): Section mismatch in
reference from the function .prom_rtas_call() to the variable
.init.data:dt_string_start The function .prom_rtas_call() references
the variable __initdata dt_string_start. This is often because
.prom_rtas_call lacks a __initdata annotation or the annotation of
dt_string_start is wrong.
WARNING: vmlinux.o(.meminit.text+0xeb0): Section mismatch in reference
from the function .free_area_init_core.isra.47() to the function
.init.text:.set_pageblock_order() The function __meminit
.free_area_init_core.isra.47() references a function __init
.set_pageblock_order(). If .set_pageblock_order is only used by
.free_area_init_core.isra.47 then annotate .set_pageblock_order with a
matching annotation.
Fix it by proper annotation of prom_rtas_call.
Signed-off-by: Vladimir Murzin <murzin.v@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Aneesh Kumar K.V [Tue, 10 Sep 2013 13:14:42 +0000 (18:44 +0530)]
powerpc: Fix possible deadlock on page fault
stack_grow_into/14082 is trying to acquire lock:
(&mm->mmap_sem){++++++}, at: [<
c000000000206d28>] .might_fault+0x78/0xe0
but task is already holding lock:
(&mm->mmap_sem){++++++}, at: [<
c0000000007ffd8c>] .do_page_fault+0x24c/0x910
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&mm->mmap_sem);
lock(&mm->mmap_sem);
*** DEADLOCK ***
May be due to missing lock nesting notation
1 lock held by stack_grow_into/14082:
#0: (&mm->mmap_sem){++++++}, at: [<
c0000000007ffd8c>] .do_page_fault+0x24c/0x910
stack backtrace:
CPU: 21 PID: 14082 Comm: stack_grow_into Not tainted 3.10.0-10.el7.ppc64.debug #1
Call Trace:
[
c0000003d396b850] [
c000000000016e7c] .show_stack+0x7c/0x1f0 (unreliable)
[
c0000003d396b920] [
c000000000813fc8] .dump_stack+0x28/0x3c
[
c0000003d396b990] [
c000000000124b90] .__lock_acquire+0x1640/0x1800
[
c0000003d396bab0] [
c00000000012570c] .lock_acquire+0xac/0x250
[
c0000003d396bb80] [
c000000000206d54] .might_fault+0xa4/0xe0
[
c0000003d396bbf0] [
c0000000007ffe2c] .do_page_fault+0x2ec/0x910
[
c0000003d396be30] [
c0000000000092e8] handle_page_fault+0x10/0x30
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Guenter Roeck [Tue, 10 Sep 2013 01:37:56 +0000 (18:37 -0700)]
powerpc: Export cpu_to_chip_id() to fix build error
powerpc allmodconfig build fails with:
ERROR: ".cpu_to_chip_id" [drivers/block/mtip32xx/mtip32xx.ko] undefined!
The problem was introduced with commit
15863ff3b (powerpc: Make chip-id
information available to userspace).
Export the missing symbol.
Cc: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Cc: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Linus Torvalds [Tue, 10 Sep 2013 21:55:16 +0000 (14:55 -0700)]
Merge tag 'cris-for-3.12' of git://jni.nu/cris
Pull CRIS updates from Jesper Nilsson:
"Mostly cleanup and removal of unused configs"
* tag 'cris-for-3.12' of git://jni.nu/cris:
CRIS: drop unused Kconfig symbols
CRIS: Add kvm_para.h which includes generic file
CRIS: remove unused current_regs
CRIS: Remove last traces of legacy RTC drivers
CRIS: remove "config OOM_REBOOT"
Akira Takeuchi [Tue, 10 Sep 2013 16:20:05 +0000 (17:20 +0100)]
mn10300: Fix crash just after starting userspace on !CONFIG_PREEMPT
The mn10300 kernel crashes just after starting userspace programs, if
CONFIG_PREEMPT is disabled:
Freeing unused kernel memory: 96K (
90286000 -
9029e000)
MISALIGN:
97c33ff9: unsupported instruction f
MISALIGN:
97c33ff9: unsupported instruction f
MISALIGN:
97c33ff9: unsupported instruction f
:
This fixes the problem that was introduced by commit
d17fc238ac14
("MN10300: Enable IRQs more in system call exit work path").
Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Tue, 10 Sep 2013 20:53:52 +0000 (13:53 -0700)]
Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux
Pull device tree core updates from Grant Likely:
"Generally minor changes. A bunch of bug fixes, particularly for
initialization and some refactoring. Most notable change if feeding
the entire flattened tree into the random pool at boot. May not be
significant, but shouldn't hurt either"
Tim Bird questions whether the boot time cost of the random feeding may
be noticeable. And "add_device_randomness()" is definitely not some
speed deamon of a function.
* tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux:
of/platform: add error reporting to of_amba_device_create()
irq/of: Fix comment typo for irq_of_parse_and_map
of: Feed entire flattened device tree into the random pool
of/fdt: Clean up casting in unflattening path
of/fdt: Remove duplicate memory clearing on FDT unflattening
gpio: implement gpio-ranges binding document fix
of: call __of_parse_phandle_with_args from of_parse_phandle
of: introduce of_parse_phandle_with_fixed_args
of: move of_parse_phandle()
of: move documentation of of_parse_phandle_with_args
of: Fix missing memory initialization on FDT unflattening
of: consolidate definition of early_init_dt_alloc_memory_arch()
of: Make of_get_phy_mode() return int i.s.o. const int
include: dt-binding: input: create a DT header defining key codes.
of/platform: Staticize of_platform_device_create_pdata()
of: Specify initrd location using 64-bit
dt: Typo fix
OF: make of_property_for_each_{u32|string}() use parameters if OF is not enabled
Linus Torvalds [Tue, 10 Sep 2013 20:37:36 +0000 (13:37 -0700)]
Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine updates from Vinod Koul:
"This pull brings:
- Andy's DW driver updates
- Guennadi's sh driver updates
- Pl08x driver fixes from Tomasz & Alban
- Improvements to mmp_pdma by Daniel
- TI EDMA fixes by Joel
- New drivers:
- Hisilicon k3dma driver
- Renesas rcar dma driver
- New API for publishing slave driver capablities
- Various fixes across the subsystem by Andy, Jingoo, Sachin etc..."
* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (94 commits)
dma: edma: Remove limits on number of slots
dma: edma: Leave linked to Null slot instead of DUMMY slot
dma: edma: Find missed events and issue them
ARM: edma: Add function to manually trigger an EDMA channel
dma: edma: Write out and handle MAX_NR_SG at a given time
dma: edma: Setup parameters to DMA MAX_NR_SG at a time
dmaengine: pl330: use dma_set_max_seg_size to set the sg limit
dmaengine: dma_slave_caps: remove sg entries
dma: replace devm_request_and_ioremap by devm_ioremap_resource
dma: ste_dma40: Fix potential null pointer dereference
dma: ste_dma40: Remove duplicate const
dma: imx-dma: Remove redundant NULL check
dma: dmagengine: fix function names in comments
dma: add driver for R-Car HPB-DMAC
dma: k3dma: use devm_ioremap_resource() instead of devm_request_and_ioremap()
dma: imx-sdma: Staticize sdma_driver_data structures
pch_dma: Add MODULE_DEVICE_TABLE
dmaengine: PL08x: Add cyclic transfer support
dmaengine: PL08x: Fix reading the byte count in cctl
dmaengine: PL08x: Add support for different maximum transfer size
...
Linus Torvalds [Tue, 10 Sep 2013 20:33:09 +0000 (13:33 -0700)]
Merge tag 'mmc-updates-for-3.12-rc1' of git://git./linux/kernel/git/cjb/mmc
Pull MMC updates from Chris Ball:
"MMC highlights for 3.12:
Core:
- Support Allocation Units 8MB-64MB in SD3.0, previous max was 4MB.
- The slot-gpio helper can now handle GPIO debouncing card-detect.
- Read supported voltages from DT "voltage-ranges" property.
Drivers:
- dw_mmc: Add support for ARC architecture, and support exynos5420.
- mmc_spi: Support CD/RO GPIOs.
- sh_mobile_sdhi: Add compatibility for more Renesas SoCs.
- sh_mmcif: Add DT support for DMA channels"
* tag 'mmc-updates-for-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (50 commits)
Revert "mmc: tmio-mmc: Remove .set_pwr() callback from platform data"
mmc: dw_mmc: Add support for ARC
mmc: sdhci-s3c: initialize host->quirks2 for using quirks2
mmc: sdhci-s3c: fix the wrong register value, when clock is disabled
mmc: esdhc: add support to get voltage from device-tree
mmc: sdhci: get voltage from sdhc host
mmc: core: parse voltage from device-tree
mmc: omap_hsmmc: use the generic config for omap2plus devices
mmc: omap_hsmmc: clear status flags before starting a new command
mmc: dw_mmc: exynos: Add a new compatible string for exynos5420
mmc: sh_mmcif: revision-specific CLK_CTRL2 handling
mmc: sh_mmcif: revision-specific Command Completion Signal handling
mmc: sh_mmcif: add support for Device Tree DMA bindings
mmc: sh_mmcif: move header include from header into .c
mmc: SDHI: add DT compatibility strings for further SoCs
mmc: dw_mmc-pci: enable bus-mastering mode
mmc: dw_mmc-pci: get resources from a proper BAR
mmc: tmio-mmc: Remove .set_pwr() callback from platform data
mmc: tmio-mmc: Remove .get_cd() callback from platform data
mmc: sh_mobile_sdhi: Remove .set_pwr() callback from platform data
...
Linus Torvalds [Tue, 10 Sep 2013 20:06:15 +0000 (13:06 -0700)]
Merge tag 'dm-3.12-changes' of git://git./linux/kernel/git/device-mapper/linux-dm
Pull device-mapper updates from Mike Snitzer:
"Add the ability to collect I/O statistics on user-defined regions of a
device-mapper device. This dm-stats code required the reintroduction
of a div64_u64_rem() helper, but as a separate method that doesn't
slow down div64_u64() -- especially on 32-bit systems.
Allow the error target to replace request-based DM devices (e.g.
multipath) in addition to bio-based DM devices.
Various other small code fixes and improvements to thin-provisioning,
DM cache and the DM ioctl interface"
* tag 'dm-3.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm stripe: silence a couple sparse warnings
dm: add statistics support
dm thin: always return -ENOSPC if no_free_space is set
dm ioctl: cleanup error handling in table_load
dm ioctl: increase granularity of type_lock when loading table
dm ioctl: prevent rename to empty name or uuid
dm thin: set pool read-only if breaking_sharing fails block allocation
dm thin: prefix pool error messages with pool device name
dm: allow error target to replace bio-based and request-based targets
math64: New separate div64_u64_rem helper
dm space map: optimise sm_ll_dec and sm_ll_inc
dm btree: prefetch child nodes when walking tree for a dm_btree_del
dm btree: use pop_frame in dm_btree_del to cleanup code
dm cache: eliminate holes in cache structure
dm cache: fix stacking of geometry limits
dm thin: fix stacking of geometry limits
dm thin: add data block size limits to Documentation
dm cache: add data block size limits to code and Documentation
dm cache: document metadata device is exclussive to a cache
dm: stop using WQ_NON_REENTRANT
Linus Torvalds [Tue, 10 Sep 2013 20:03:41 +0000 (13:03 -0700)]
Merge tag 'md/3.12' of git://neil.brown.name/md
Pull md update from Neil Brown:
"Headline item is multithreading for RAID5 so that more IO/sec can be
supported on fast (SSD) devices. Also TILE-Gx SIMD suppor for RAID6
calculations and an assortment of bug fixes"
* tag 'md/3.12' of git://neil.brown.name/md:
raid5: only wakeup necessary threads
md/raid5: flush out all pending requests before proceeding with reshape.
md/raid5: use seqcount to protect access to shape in make_request.
raid5: sysfs entry to control worker thread number
raid5: offload stripe handle to workqueue
raid5: fix stripe release order
raid5: make release_stripe lockless
md: avoid deadlock when dirty buffers during md_stop.
md: Don't test all of mddev->flags at once.
md: Fix apparent cut-and-paste error in super_90_validate
raid6/test: replace echo -e with printf
RAID: add tilegx SIMD implementation of raid6
md: fix safe_mode buglet.
md: don't call md_allow_write in get_bitmap_file.
Linus Torvalds [Tue, 10 Sep 2013 19:44:24 +0000 (12:44 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs
Pull vfs pile 3 (of many) from Al Viro:
"Waiman's conversion of d_path() and bits related to it,
kern_path_mountpoint(), several cleanups and fixes (exportfs
one is -stable fodder, IMO).
There definitely will be more... ;-/"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
split read_seqretry_or_unlock(), convert d_walk() to resulting primitives
dcache: Translating dentry into pathname without taking rename_lock
autofs4 - fix device ioctl mount lookup
introduce kern_path_mountpoint()
rename user_path_umountat() to user_path_mountpoint_at()
take unlazy_walk() into umount_lookup_last()
Kill indirect include of file.h from eventfd.h, use fdget() in cgroup.c
prune_super(): sb->s_op is never NULL
exportfs: don't assume that ->iterate() won't feed us too long entries
afs: get rid of redundant ->d_name.len checks
Linus Torvalds [Tue, 10 Sep 2013 19:17:49 +0000 (12:17 -0700)]
vfs: make sure we don't have a stale root path if unlazy_walk() fails
When I moved the RCU walk termination into unlazy_walk(), I didn't copy
quite all of it: for the successful RCU termination we properly add the
necessary reference counts to our temporary copy of the root path, but
for the failure case we need to make sure that any temporary root path
information is cleared out (since it does _not_ have the proper
reference counts from the RCU lookup).
We could clean up this mess by just always dropping the temporary root
information, but Al points out that that would mean that a single lookup
through symlinks could see multiple different root entries if it races
with another thread doing chroot. Not that I think we should really
care (we had that before too, back before we had a copy of the root path
in the nameidata).
Al says he has a cunning plan. In the meantime, this is the minimal fix
for the problem, even if it's not all that pretty.
Reported-by: Mace Moneta <moneta.mace@gmail.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Paul Bolle [Tue, 10 Sep 2013 15:38:07 +0000 (17:38 +0200)]
CRIS: drop unused Kconfig symbols
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Jesper Nilsson [Mon, 15 Apr 2013 15:13:07 +0000 (17:13 +0200)]
CRIS: Add kvm_para.h which includes generic file
Copied from frv.
Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Jesper Nilsson [Tue, 16 Apr 2013 14:06:23 +0000 (16:06 +0200)]
CRIS: remove unused current_regs
CC: Mikael Starvik <starvik@axis.com>
CC: linux-cris-kernel@axis.com
Signed-off-by: Jonas Bonn <jonas@southpole.se>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Paul Bolle [Wed, 20 Mar 2013 09:43:48 +0000 (10:43 +0100)]
CRIS: Remove last traces of legacy RTC drivers
These legacy drivers were removed in commit
9c75fc8c5c8c50775fc8b89418219221335b758f ("CRIS: Remove legacy RTC
drivers"). Now remove their last traces in two Kconfig files and one
Makefile.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jesper Nilsson <jespern@axis.com>
Paul Bolle [Fri, 22 Mar 2013 21:45:51 +0000 (22:45 +0100)]
CRIS: remove "config OOM_REBOOT"
The Kconfig symbol OOM_REBOOT got added in v2.6.25. It has never been
used. Its entry can safely be removed.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Jingoo Han [Mon, 9 Sep 2013 05:29:32 +0000 (14:29 +0900)]
hwmon: (ina2xx) Remove casting the return value which is a void pointer
Casting the return value which is a void pointer is redundant.
The conversion from void pointer to any other pointer type is
guaranteed by the C programming language.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Guenter Roeck [Mon, 9 Sep 2013 02:31:59 +0000 (19:31 -0700)]
hwmon: (hwmon-vid) Add __maybe_unused attribute to dummy variable
This gets rid of this warning:
drivers/hwmon/hwmon-vid.c: In function 'get_via_model_d_vrm':
drivers/hwmon/hwmon-vid.c:249:27: warning: variable 'dummy' set but not used
[-Wunused-but-set-variable]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Dave Airlie [Sun, 8 Sep 2013 21:30:56 +0000 (07:30 +1000)]
drm/nouveau: fix oops on runtime suspend/resume
if we have no crtcs we need to not call the display resume code.
Reported-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Dave Airlie [Tue, 10 Sep 2013 02:36:55 +0000 (12:36 +1000)]
Merge tag 'drm-intel-fixes-2013-09-06' of git://people.freedesktop.org/~danvet/drm-intel into drm-fixes
- Early stolen mem reservation from Jesse in x86 boot code. Acked by Ingo
and hpa. This was ready much earlier but somehow I've thought it'd go
in through x86 trees, hence why this is late. Avoids the pci resource
code to plant mmiobars in the middle of stolen mem and other ugliness.
- vgaarb improvements from Alex Williamson plus the fix from Ville for the
vgacon->fbcon smooth transition "feature".
- Render pageflips on ivb/hsw to avoid stalls due to the ring switching
when only flipping on the blitter (Chris).
- Deadlock fixes around our flush_workqueue which crept back in - lockdep
isn't clever enough :(
- Shrinker recursion fix from Chris - this is the thing that blew the vma
patches from Ben I've taken out of 3.12.
- Fixup for the relocation refactoring. Also an igt testcase to make sure
we don't break this again.
- Pile of smaller fixups all over, shortlog has full details.
* tag 'drm-intel-fixes-2013-09-06' of git://people.freedesktop.org/~danvet/drm-intel: (29 commits)
drm/i915: Delay disabling of VGA memory until vgacon->fbcon handoff is done
drm/i915: try not to lose backlight CBLV precision
drm/i915: Confine page flips to BCS on Valleyview
drm/i915: Skip stolen region initialisation if none is reserved
drm/i915: fix gpu hang vs. flip stall deadlocks
drm/i915: Hold an object reference whilst we shrink it
drm/i915: fix i9xx_crtc_clock_get for multiplied pixels
drm/i915: handle sdvo input pixel multiplier correctly again
drm/i915: fix hpd work vs. flush_work in the pageflip code deadlock
drm/i915: fix up the relocate_entry refactoring
drm/i915: Fix pipe config warnings when dealing with LVDS fixed mode
drm/i915: Don't call sg_free_table() if sg_alloc_table() fails
i915: Update VGA arbiter support for newer devices
vgaarb: Fix VGA decodes changes
vgaarb: Don't disable resources that are not owned
drm/i915: Pin pages whilst mapping the dma-buf
drm/i915: enable trickle feed on Haswell
x86: add early quirk for reserving Intel graphics stolen memory v5
drm/i915: split PCI IDs out into i915_drm.h v4
i915_gem: Convert kmem_cache_alloc(...GFP_ZERO) to kmem_cache_zalloc
...
Linus Torvalds [Tue, 10 Sep 2013 01:07:15 +0000 (18:07 -0700)]
Merge tag 'dmaengine-3.12' of git://git./linux/kernel/git/djbw/dmaengine
Pull dmaengine update from Dan Williams:
"Collection of random updates to the core and some end-driver fixups
for ioatdma and mv_xor:
- NUMA aware channel allocation
- Cleanup dmatest debugfs interface
- ioat: make raid-support Atom only
- mv_xor: big endian
Aside from the top three commits these have all had some soak time in
-next. The top commit fixes a recent build breakage.
It has been a long while since my last pull request, hopefully it does
not show. Thanks to Vinod for keeping an eye on drivers/dma/ this
past year"
* tag 'dmaengine-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine:
dmaengine: dma_sync_wait and dma_find_channel undefined
MAINTAINERS: update email for Dan Williams
dma: mv_xor: Fix incorrect error path
ioatdma: silence GCC warnings
dmaengine: make dma_channel_rebalance() NUMA aware
dmaengine: make dma_submit_error() return an error code
ioatdma: disable RAID on non-Atom platforms and reenable unaligned copies
mv_xor: support big endian systems using descriptor swap feature
mv_xor: use {readl, writel}_relaxed instead of __raw_{readl, writel}
dmatest: print message on debug level in case of no error
dmatest: remove IS_ERR_OR_NULL checks of debugfs calls
dmatest: make module parameters writable
Jon Mason [Mon, 9 Sep 2013 23:51:59 +0000 (16:51 -0700)]
dmaengine: dma_sync_wait and dma_find_channel undefined
dma_sync_wait and dma_find_channel are declared regardless of whether
CONFIG_DMA_ENGINE is enabled, but calling the function without
CONFIG_DMA_ENGINE enabled results "undefined reference" errors.
To get around this, declare dma_sync_wait and dma_find_channel as inline
functions if CONFIG_DMA_ENGINE is undefined.
Signed-off-by: Jon Mason <jon.mason@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Linus Torvalds [Mon, 9 Sep 2013 23:35:29 +0000 (16:35 -0700)]
Merge tag 'late-for-linus' of git://git./linux/kernel/git/arm/arm-soc
Pull ARM SoC late changes from Kevin Hilman:
"These are changes that arrived a little late before the merge window,
or had dependencies on previous branches.
Highlights:
- ux500: misc. cleanup, fixup I2C devices
- exynos: DT updates for RTC; PM updates
- at91: DT updates for NAND; new platforms added to generic defconfig
- sunxi: DT updates: cubieboard2, pinctrl driver, gated clocks
- highbank: LPAE fixes, select necessary ARM errata
- omap: PM fixes and improvements; OMAP5 mailbox support
- omap: basic support for new DRA7xx SoCs"
* tag 'late-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (60 commits)
ARM: dts: vexpress: Add CCI node to TC2 device-tree
ARM: EXYNOS: Skip C1 cpuidle state for exynos5440
ARM: EXYNOS: always enable PM domains support for EXYNOS4X12
ARM: highbank: clean-up some unused includes
ARM: sun7i: Enable the A20 clocks in the DTSI
ARM: sun6i: Enable clock support in the DTSI
ARM: sun5i: dt: Use the A10s gates in the DTSI
ARM: at91: at91_dt_defconfig: enable rm9200 support
ARM: dts: add ADC device tree node for exynos5420/5250
ARM: dts: Add RTC DT node to Exynos5420 SoC
ARM: dts: Update the "status" property of RTC DT node for Exynos5250 SoC
ARM: dts: Fix the RTC DT node name for Exynos5250
irqchip: mmp: avoid to include irqs head file
ARM: mmp: avoid to include head file in mach-mmp
irqchip: mmp: support irqchip
irqchip: move mmp irq driver
ARM: OMAP: AM33xx: clock: Add RNG clock data
ARM: OMAP: TI81XX: add always-on powerdomain for TI81XX
ARM: OMAP4: clock: Lock PLLs in the right sequence
ARM: OMAP: AM33XX: hwmod: Add hwmod data for debugSS
...
Linus Torvalds [Mon, 9 Sep 2013 23:33:57 +0000 (16:33 -0700)]
Merge tag 'renesas-for-linus' of git://git./linux/kernel/git/arm/arm-soc
Pull ARM Renesas SoC cleanup, refactoring and more SMP support from Kevin Hilman:
"Lots of cleanup and refactoring and some SMP additions for Renesas
platforms. Due to some inter-dependencies with other arm-soc
branches, this Renesas stuff was separated out for sending after the
other branches were merged.
Highlights:
- remove unused board support and cleanup of unused headers
- refactoring of init and device registration
- simplify IRQ initialization"
* tag 'renesas-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (68 commits)
ARM: shmobile: Per-CPU SMP boot / sleep code for SCU SoCs
ARM: shmobile: Introduce per-CPU SMP boot / sleep code
ARM: shmobile: Use shared SCU CPU Hotplug code on r8a7779
ARM: shmobile: Use shared SCU CPU Hotplug code on sh73a0
ARM: shmobile: Add shared SCU CPU Hotplug code
ARM: shmobile: Use shared SCU SMP boot code on emev2
ARM: shmobile: Use shared SCU SMP boot code on r8a7779
ARM: shmobile: Use shared SCU SMP boot code on sh73a0
ARM: shmobile: Introduce shared SCU SMP boot code
ARM: shmobile: sh73a0: Remove global GPIO_NR definition
ARM: shmobile: kzm9d: remove nfsroot settings from bootargs
ARM: shmobile: armadillo800eva: remove nfsroot settings from bootargs
ARM: shmobile: r8a7779: move r8a7779_init_irq_xxx() to setup
ARM: shmobile: r8a7740: move r8a7740_init_irq_of() to setup
ARM: shmobile: bockw: add missing __initdata
ARM: shmobile: r8a7790: add missing __initdata
ARM: shmobile: r8a7779: add missing __initdata
ARM: shmobile: Remove unused shmobile_init_time()
ARM: shmobile: Use clocksource_of_init() on r8a7790
ARM: shmobile: Use default ->init_time() on KZM9G DT ref
...
Linus Torvalds [Mon, 9 Sep 2013 23:08:13 +0000 (16:08 -0700)]
Merge tag 'drivers-for-linus' of git://git./linux/kernel/git/arm/arm-soc
Pull ARM SoC driver update from Kevin Hilman:
"This contains the ARM SoC related driver updates for v3.12. The only
thing this cycle are core PM updates and CPUidle support for ARM's TC2
big.LITTLE development platform"
* tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
cpuidle: big.LITTLE: vexpress-TC2 CPU idle driver
ARM: vexpress: tc2: disable GIC CPU IF in tc2_pm_suspend
drivers: irq-chip: irq-gic: introduce gic_cpu_if_down()
Linus Torvalds [Mon, 9 Sep 2013 22:49:04 +0000 (15:49 -0700)]
Merge tag 'clk-for-linus-3.12' of git://git.linaro.org/people/mturquette/linux
Pull clock framework changes from Michael Turquette:
"The common clk framework changes for 3.12 are dominated by clock
driver patches, both new drivers and fixes to existing. A high
percentage of these are for Samsung platforms like Exynos. Core
framework fixes and some new features like automagical clock
re-parenting round out the patches"
* tag 'clk-for-linus-3.12' of git://git.linaro.org/people/mturquette/linux: (102 commits)
clk: only call get_parent if there is one
clk: samsung: exynos5250: Simplify registration of PLL rate tables
clk: samsung: exynos4: Register PLL rate tables for Exynos4x12
clk: samsung: exynos4: Register PLL rate tables for Exynos4210
clk: samsung: exynos4: Reorder registration of mout_vpllsrc
clk: samsung: pll: Add support for rate configuration of PLL46xx
clk: samsung: pll: Use new registration method for PLL46xx
clk: samsung: pll: Add support for rate configuration of PLL45xx
clk: samsung: pll: Use new registration method for PLL45xx
clk: samsung: exynos4: Rename exynos4_plls to exynos4x12_plls
clk: samsung: exynos4: Remove checks for DT node
clk: samsung: exynos4: Remove unused static clkdev aliases
clk: samsung: Modify _get_rate() helper to use __clk_lookup()
clk: samsung: exynos4: Use separate aliases for cpufreq related clocks
clocksource: samsung_pwm_timer: Get clock from device tree
ARM: dts: exynos4: Specify PWM clocks in PWM node
pwm: samsung: Update DT bindings documentation to cover clocks
clk: Move symbol export to proper location
clk: fix new_parent dereference before null check
clk: wm831x: Initialise wm831x pointer on init
...
Linus Torvalds [Mon, 9 Sep 2013 21:42:15 +0000 (14:42 -0700)]
Merge tag 'trace-3.12' of git://git./linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
"Not much changes for the 3.12 merge window. The major tracing changes
are still in flux, and will have to wait for 3.13.
The changes for 3.12 are mostly clean ups and minor fixes.
H Peter Anvin added a check to x86_32 static function tracing that
helps a small segment of the kernel community.
Oleg Nesterov had a few changes from 3.11, but were mostly clean ups
and not worth pushing in the -rc time frame.
Li Zefan had small clean up with annotating a raw_init with __init.
I fixed a slight race in updating function callbacks, but the race is
so small and the bug that happens when it occurs is so minor it's not
even worth pushing to stable.
The only real enhancement is from Alexander Z Lam that made the
tracing_cpumask work for trace buffer instances, instead of them all
sharing a global cpumask"
* tag 'trace-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ftrace/rcu: Do not trace debug_lockdep_rcu_enabled()
x86-32, ftrace: Fix static ftrace when early microcode is enabled
ftrace: Fix a slight race in modifying what function callback gets traced
tracing: Make tracing_cpumask available for all instances
tracing: Kill the !CONFIG_MODULES code in trace_events.c
tracing: Don't pass file_operations array to event_create_dir()
tracing: Kill trace_create_file_ops() and friends
tracing/syscalls: Annotate raw_init function with __init
Alex Elder [Thu, 5 Sep 2013 13:33:24 +0000 (08:33 -0500)]
clk: only call get_parent if there is one
In __clk_init(), after a clock is mostly initialized, a scan is done
of the orphan clocks to see if the clock being registered is the
parent of any of them.
This code assumes that any clock that provides a get_parent method
actually has at least one parent, and that's not a valid assumption.
As a result, an orphan clock with no parent can return *something*
as the parent index, and that value is blindly used to dereference
the orphan's parent_names[] array (which will be ZERO_SIZE_PTR or
NULL).
Fix this by ensuring get_parent is only called for orphans with at
least one parent.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Al Viro [Mon, 9 Sep 2013 19:22:25 +0000 (15:22 -0400)]
split read_seqretry_or_unlock(), convert d_walk() to resulting primitives
Separate "check if we need to retry" from "unlock if we are done and
had seq_writelock"; that allows to use these guys in d_walk(), where
we need to recheck every time we ascend back to parent, but do *not*
want to unlock until the very end. Lift rcu_read_lock/rcu_read_unlock
out into callers.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linus Torvalds [Mon, 9 Sep 2013 18:19:09 +0000 (11:19 -0700)]
Merge tag 'xfs-for-linus-v3.12-rc1' of git://oss.sgi.com/xfs/xfs
Pull xfs updates from Ben Myers:
"For 3.12-rc1 there are a number of bugfixes in addition to work to
ease usage of shared code between libxfs and the kernel, the rest of
the work to enable project and group quotas to be used simultaneously,
performance optimisations in the log and the CIL, directory entry file
type support, fixes for log space reservations, some spelling/grammar
cleanups, and the addition of user namespace support.
- introduce readahead to log recovery
- add directory entry file type support
- fix a number of spelling errors in comments
- introduce new Q_XGETQSTATV quotactl for project quotas
- add USER_NS support
- log space reservation rework
- CIL optimisations
- kernel/userspace libxfs rework"
* tag 'xfs-for-linus-v3.12-rc1' of git://oss.sgi.com/xfs/xfs: (112 commits)
xfs: XFS_MOUNT_QUOTA_ALL needed by userspace
xfs: dtype changed xfs_dir2_sfe_put_ino to xfs_dir3_sfe_put_ino
Fix wrong flag ASSERT in xfs_attr_shortform_getvalue
xfs: finish removing IOP_* macros.
xfs: inode log reservations are too small
xfs: check correct status variable for xfs_inobt_get_rec() call
xfs: inode buffers may not be valid during recovery readahead
xfs: check LSN ordering for v5 superblocks during recovery
xfs: btree block LSN escaping to disk uninitialised
XFS: Assertion failed: first <= last && last < BBTOB(bp->b_length), file: fs/xfs/xfs_trans_buf.c, line: 568
xfs: fix bad dquot buffer size in log recovery readahead
xfs: don't account buffer cancellation during log recovery readahead
xfs: check for underflow in xfs_iformat_fork()
xfs: xfs_dir3_sfe_put_ino can be static
xfs: introduce object readahead to log recovery
xfs: Simplify xfs_ail_min() with list_first_entry_or_null()
xfs: Register hotcpu notifier after initialization
xfs: add xfs sb v4 support for dirent filetype field
xfs: Add write support for dirent filetype field
xfs: Add read-only support for dirent filetype field
...
Olof Johansson [Mon, 9 Sep 2013 17:34:23 +0000 (10:34 -0700)]
direct-io: Use return from cmpxchg to decide of assignment happened
Not using the return value can in the generic case be racy, so it's
in general good practice to check the return value instead.
This also resolved the warning caused on ARM and other architectures:
fs/direct-io.c: In function 'sb_init_dio_done_wq':
fs/direct-io.c:557:2: warning: value computed is not used [-Wunused-value]
Signed-off-by: Olof Johansson <olof@lixom.net>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: H Peter Anvin <hpa@zytor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Waiman Long [Mon, 9 Sep 2013 16:18:13 +0000 (12:18 -0400)]
dcache: Translating dentry into pathname without taking rename_lock
When running the AIM7's short workload, Linus' lockref patch eliminated
most of the spinlock contention. However, there were still some left:
8.46% reaim [kernel.kallsyms] [k] _raw_spin_lock
|--42.21%-- d_path
| proc_pid_readlink
| SyS_readlinkat
| SyS_readlink
| system_call
| __GI___readlink
|
|--40.97%-- sys_getcwd
| system_call
| __getcwd
The big one here is the rename_lock (seqlock) contention in d_path()
and the getcwd system call. This patch will eliminate the need to take
the rename_lock while translating dentries into the full pathnames.
The need to take the rename_lock is to make sure that no rename
operation can be ongoing while the translation is in progress. However,
only one thread can take the rename_lock thus blocking all the other
threads that need it even though the translation process won't make
any change to the dentries.
This patch will replace the writer's write_seqlock/write_sequnlock
sequence of the rename_lock of the callers of the prepend_path() and
__dentry_path() functions with the reader's read_seqbegin/read_seqretry
sequence within these 2 functions. As a result, the code will have to
retry if one or more rename operations had been performed. In addition,
RCU read lock will be taken during the translation process to make sure
that no dentries will go away. To prevent live-lock from happening,
the code will switch back to take the rename_lock if read_seqretry()
fails for three times.
To further reduce spinlock contention, this patch does not take the
dentry's d_lock when copying the filename from the dentries. Instead,
it treats the name pointer and length as unreliable and just copy
the string byte-by-byte over until it hits a null byte or the end of
string as specified by the length. This should avoid stepping into
invalid memory address. The error cases are left to be handled by
the sequence number check.
The following code re-factoring are also made:
1. Move prepend('/') into prepend_name() to remove one conditional
check.
2. Move the global root check in prepend_path() back to the top of
the while loop.
With this patch, the _raw_spin_lock will now account for only 1.2%
of the total CPU cycles for the short workload. This patch also has
the effect of reducing the effect of running perf on its profile
since the perf command itself can be a heavy user of the d_path()
function depending on the complexity of the workload.
When taking the perf profile of the high-systime workload, the amount
of spinlock contention contributed by running perf without this patch
was about 16%. With this patch, the spinlock contention caused by
the running of perf will go away and we will have a more accurate
perf profile.
Signed-off-by: Waiman Long <Waiman.Long@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linus Torvalds [Mon, 9 Sep 2013 17:33:19 +0000 (10:33 -0700)]
Merge tag 'for-linus-
20130909' of git://git.infradead.org/linux-mtd
Pull mtd updates from David Woodhouse:
- factor out common code from MTD tests
- nand-gpio cleanup and portability to non-ARM
- m25p80 support for 4-byte addressing chips, other new chips
- pxa3xx cleanup and support for new platforms
- remove obsolete alauda, octagon-5066 drivers
- erase/write support for bcm47xxsflash
- improve detection of ECC requirements for NAND, controller setup
- NFC acceleration support for atmel-nand, read/write via SRAM
- etc
* tag 'for-linus-
20130909' of git://git.infradead.org/linux-mtd: (184 commits)
mtd: chips: Add support for PMC SPI Flash chips in m25p80.c
mtd: ofpart: use for_each_child_of_node() macro
mtd: mtdswap: replace strict_strtoul() with kstrtoul()
mtd cs553x_nand: use kzalloc() instead of memset
mtd: atmel_nand: fix error return code in atmel_nand_probe()
mtd: bcm47xxsflash: writing support
mtd: bcm47xxsflash: implement erasing support
mtd: bcm47xxsflash: convert to module_platform_driver instead of init/exit
mtd: bcm47xxsflash: convert kzalloc to avoid invalid access
mtd: remove alauda driver
mtd: nand: mxc_nand: mark 'const' properly
mtd: maps: cfi_flagadm: add missing __iomem annotation
mtd: spear_smi: add missing __iomem annotation
mtd: r852: Staticize local symbols
mtd: nandsim: Staticize local symbols
mtd: impa7: add missing __iomem annotation
mtd: sm_ftl: Staticize local symbols
mtd: m25p80: add support for mr25h10
mtd: m25p80: make CONFIG_M25PXX_USE_FAST_READ safe to enable
mtd: m25p80: Pass flags through CAT25_INFO macro
...
Linus Torvalds [Mon, 9 Sep 2013 17:32:03 +0000 (10:32 -0700)]
Merge tag 'firewire-updates' of git://git./linux/kernel/git/ieee1394/linux1394
Pull firewire updates from Stefan Richter:
- Fix a regression since 3.2 inclusive: The subsystem workqueue
deadlocked between transaction completion handling and bus reset
handling if the worker pool could not be increased in time.
- janitorial updates
* tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
firewire: ohci: Fix deadlock at bus reset
firewire: ohci: Change module_pci_driver to module_init/module_exit
firewire: ohci: beautify some macro definitions
firewire: ohci: change confusing name of a struct member
firewire: core: typecast from gfp_t to bool more safely
firewire: WQ_NON_REENTRANT is meaningless and going away
Dan Williams [Mon, 9 Sep 2013 17:29:56 +0000 (10:29 -0700)]
MAINTAINERS: update email for Dan Williams
Returned to intel.com
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Jon Mason <jon.mason@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Shaohua Li <shli@kernel.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Linus Torvalds [Mon, 9 Sep 2013 17:26:33 +0000 (10:26 -0700)]
Merge branch 'for-v3.12' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping
Pull DMA mapping update from Marek Szyprowski:
"This contains an addition of Device Tree support for reserved memory
regions (Contiguous Memory Allocator is one of the drivers for it) and
changes required by the KVM extensions for PowerPC architectue"
* 'for-v3.12' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping:
ARM: init: add support for reserved memory defined by device tree
drivers: of: add initialization code for dma reserved memory
drivers: of: add function to scan fdt nodes given by path
drivers: dma-contiguous: clean source code and prepare for device tree
Sachin Kamat [Mon, 2 Sep 2013 08:24:20 +0000 (13:54 +0530)]
dma: mv_xor: Fix incorrect error path
Return directly if memory allocation fails. There is no need
of dma_free_coherent().
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Saeed Bishara <saeed@marvell.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Linus Torvalds [Mon, 9 Sep 2013 17:20:54 +0000 (10:20 -0700)]
Merge tag 'virtio-next-for-linus' of git://git./linux/kernel/git/rusty/linux
Pull virtio update from Rusty Russell:
"More console fixes; these are the theoretical ones which didn't get
CC:stable. But for that reason, I did a merge with master partway
through to avoid an unnecessary conflict.
Also: a fun lguest bug turns out if you don't clear the TF flag when
trapping Bad Things happen to the guest kernel as the stack
overflows..."
* tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
virtio_pci: pm: Use CONFIG_PM_SLEEP instead of CONFIG_PM
lguest: fix GPF in guest when using gdb.
lguest: fix guest kernel stack overflow when TF bit set.
lguest: fix BUG_ON() in invalid guest page table.
virtio: console: prevent use-after-free of port name in port unplug
virtio: console: cleanup an error message
virtio: console: fix locking around send_sigio_to_port()
virtio: console: add locking in port unplug path
virtio: console: add locks around buffer removal in port unplug path
tools/lguest: offer VIRTIO_F_ANY_LAYOUT for net device.
virtio tools: add .gitignore
lguest: Point to the right directory for the lguest launcher
Linus Torvalds [Mon, 9 Sep 2013 17:19:36 +0000 (10:19 -0700)]
Merge tag 'vfio-v3.12-rc0' of git://github.com/awilliam/linux-vfio
Pull VFIO update from Alex Williamson:
"VFIO updates include safer default file flags for VFIO device fds, an
external user interface exported to allow other modules to hold
references to VFIO groups, a fix to test for extended config space on
PCIe and PCI-x, and new hot reset interfaces for PCI devices which
allows the user to do PCI bus/slot resets when all of the devices
affected by the reset are owned by the user.
For this last feature, the PCI bus reset interface, I depend on
changes already merged from Bjorn's PCI pull request. I therefore
merged my tree up to commit
cb3e433, which I think was the correct
action, but as Stephen Rothwell noted, I failed to provide a commit
message indicating why the merge was required. Sorry for that.
Thanks, Alex"
* tag 'vfio-v3.12-rc0' of git://github.com/awilliam/linux-vfio:
vfio: fix documentation
vfio-pci: PCI hot reset interface
vfio-pci: Test for extended config space
vfio-pci: Use fdget() rather than eventfd_fget()
vfio: Add O_CLOEXEC flag to vfio device fd
vfio: use get_unused_fd_flags(0) instead of get_unused_fd()
vfio: add external user support
Konrad Rzeszutek Wilk [Mon, 9 Sep 2013 17:08:49 +0000 (13:08 -0400)]
xen/spinlock: Don't use __initdate for xen_pv_spin
As we get compile warnings about .init.data being
used by non-init functions.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Linus Torvalds [Mon, 9 Sep 2013 16:19:15 +0000 (09:19 -0700)]
Merge tag 'nfs-for-3.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust:
"Highlights include:
- Fix NFSv4 recovery so that it doesn't recover lost locks in cases
such as lease loss due to a network partition, where doing so may
result in data corruption. Add a kernel parameter to control
choice of legacy behaviour or not.
- Performance improvements when 2 processes are writing to the same
file.
- Flush data to disk when an RPCSEC_GSS session timeout is imminent.
- Implement NFSv4.1 SP4_MACH_CRED state protection to prevent other
NFS clients from being able to manipulate our lease and file
locking state.
- Allow sharing of RPCSEC_GSS caches between different rpc clients.
- Fix the broken NFSv4 security auto-negotiation between client and
server.
- Fix rmdir() to wait for outstanding sillyrename unlinks to complete
- Add a tracepoint framework for debugging NFSv4 state recovery
issues.
- Add tracing to the generic NFS layer.
- Add tracing for the SUNRPC socket connection state.
- Clean up the rpc_pipefs mount/umount event management.
- Merge more patches from Chuck in preparation for NFSv4 migration
support"
* tag 'nfs-for-3.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (107 commits)
NFSv4: use mach cred for SECINFO_NO_NAME w/ integrity
NFS: nfs_compare_super shouldn't check the auth flavour unless 'sec=' was set
NFSv4: Allow security autonegotiation for submounts
NFSv4: Disallow security negotiation for lookups when 'sec=' is specified
NFSv4: Fix security auto-negotiation
NFS: Clean up nfs_parse_security_flavors()
NFS: Clean up the auth flavour array mess
NFSv4.1 Use MDS auth flavor for data server connection
NFS: Don't check lock owner compatability unless file is locked (part 2)
NFS: Don't check lock owner compatibility in writes unless file is locked
nfs4: Map NFS4ERR_WRONG_CRED to EPERM
nfs4.1: Add SP4_MACH_CRED write and commit support
nfs4.1: Add SP4_MACH_CRED stateid support
nfs4.1: Add SP4_MACH_CRED secinfo support
nfs4.1: Add SP4_MACH_CRED cleanup support
nfs4.1: Add state protection handler
nfs4.1: Minimal SP4_MACH_CRED implementation
SUNRPC: Replace pointer values with task->tk_pid and rpc_clnt->cl_clid
SUNRPC: Add an identifier for struct rpc_clnt
SUNRPC: Ensure rpc_task->tk_pid is available for tracepoints
...
Linus Torvalds [Mon, 9 Sep 2013 16:18:23 +0000 (09:18 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mszeredi/fuse
Pull fuse bugfixes from Miklos Szeredi:
"Just a bunch of bugfixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: use list_for_each_entry() for list traversing
fuse: readdir: check for slash in names
fuse: hotfix truncate_pagecache() issue
fuse: invalidate inode attributes on xattr modification
fuse: postpone end_page_writeback() in fuse_writepage_locked()
Linus Torvalds [Mon, 9 Sep 2013 16:16:51 +0000 (09:16 -0700)]
Merge tag 'gfs2-merge-window' of git://git./linux/kernel/git/steve/gfs2-3.0-nmw
Pull GFS2 updates from Steven Whitehouse:
"This is possibly the smallest ever set of GFS2 patches for a merge
window. Also, most of them are bug fixes this time.
Two of my three patches (moving gfs2_sync_meta and merging the two
writepage implementations) are clean ups with the third (taking the
glock ref in examine_bucket) being a fix for a difficult to hit race
condition.
The removal of an unused memory barrier is a clean up from Bob
Peterson, and the "spectator" relates to a rarely used mount option.
Ben Marzinski's patch fixes a corner case where the incorrect inode
flags were being set, resulting in incorrect behaviour on fsync"
* tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw:
GFS2: dirty inode correctly in gfs2_write_end
GFS2: Don't flag consistency error if first mounter is a spectator
GFS2: Remove unnecessary memory barrier
GFS2: Merge ordered and writeback writepage
GFS2: Take glock reference in examine_bucket()
GFS2: Move gfs2_sync_meta to lops.c
Linus Torvalds [Mon, 9 Sep 2013 16:13:22 +0000 (09:13 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client
Pull ceph updates from Sage Weil:
"This includes both the first pile of Ceph patches (which I sent to
torvalds@vger, sigh) and a few new patches that add support for
fscache for Ceph. That includes a few fscache core fixes that David
Howells asked go through the Ceph tree. (Thanks go to Milosz Tanski
for putting this feature together)
This first batch of patches (included here) had (has) several
important RBD bug fixes, hole punch support, several different
cleanups in the page cache interactions, improvements in the truncate
code (new truncate mutex to avoid shenanigans with i_mutex), and a
series of fixes in the synchronous striping read/write code.
On top of that is a random collection of small fixes all across the
tree (error code checks and error path cleanup, obsolete wq flags,
etc)"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (43 commits)
ceph: use d_invalidate() to invalidate aliases
ceph: remove ceph_lookup_inode()
ceph: trivial buildbot warnings fix
ceph: Do not do invalidate if the filesystem is mounted nofsc
ceph: page still marked private_2
ceph: ceph_readpage_to_fscache didn't check if marked
ceph: clean PgPrivate2 on returning from readpages
ceph: use fscache as a local presisent cache
fscache: Netfs function for cleanup post readpages
FS-Cache: Fix heading in documentation
CacheFiles: Implement interface to check cache consistency
FS-Cache: Add interface to check consistency of a cached object
rbd: fix null dereference in dout
rbd: fix buffer size for writes to images with snapshots
libceph: use pg_num_mask instead of pgp_num_mask for pg.seed calc
rbd: fix I/O error propagation for reads
ceph: use vfs __set_page_dirty_nobuffers interface instead of doing it inside filesystem
ceph: allow sync_read/write return partial successed size of read/write.
ceph: fix bugs about handling short-read for sync read mode.
ceph: remove useless variable revoked_rdcache
...
Linus Torvalds [Mon, 9 Sep 2013 16:09:44 +0000 (09:09 -0700)]
Merge tag 'metag-for-v3.12' of git://git./linux/kernel/git/jhogan/metag
Pull metag architecture changes from James Hogan:
- Device tree updates for TZ1090 GPIO drivers merged via GPIO tree.
- Add driver for ImgTec PDC irqchip as found in TZ1090 SoC.
- Add linux-metag mailing list to MAINTAINERS file.
* tag 'metag-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag:
irq-imgpdc: add ImgTec PDC irqchip driver
MAINTAINERS: add linux-metag mailing list
metag: tz1090: instantiate gpio-tz1090-pdc
metag: tz1090: select and instantiate gpio-tz1090
metag: tz1090: select and instantiate irq-imgpdc
Konrad Rzeszutek Wilk [Mon, 26 Aug 2013 18:28:50 +0000 (14:28 -0400)]
Revert "xen/spinlock: Disable IRQ spinlock (PV) allocation on PVHVM"
This reverts commit
70dd4998cb85f0ecd6ac892cc7232abefa432efb.
Now that the bugs have been resolved we can re-enable the
PV ticketlock implementation under PVHVM Xen guests.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Konrad Rzeszutek Wilk [Mon, 26 Aug 2013 18:28:06 +0000 (14:28 -0400)]
xen/spinlock: Don't setup xen spinlock IPI kicker if disabled.
There is no need to setup this kicker IPI if we are never going
to use the paravirtualized ticketlock mechanism.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Konrad Rzeszutek Wilk [Fri, 16 Aug 2013 18:39:56 +0000 (14:39 -0400)]
xen/smp: Update pv_lock_ops functions before alternative code starts under PVHVM
Before this patch we would patch all of the pv_lock_ops sites
using alternative assembler. Then later in the bootup cycle
change the unlock_kick and lock_spinning to the Xen specific -
without re patching.
That meant that for the core of the kernel we would be running
with the baremetal version of unlock_kick and lock_spinning while
for modules we would have the proper Xen specific slowpaths.
As most of the module uses some API from the core kernel that ended
up with slowpath lockers waiting forever to be kicked (b/c they
would be using the Xen specific slowpath logic). And the
kick never came b/c the unlock path that was taken was the
baremetal one.
On PV we do not have the problem as we initialise before the
alternative code kicks in.
The fix is to make the updating of the pv_lock_ops function
be done before the alternative code starts patching.
Note that this patch fixes issues discovered by commit
f10cd522c5fbfec9ae3cc01967868c9c2401ed23.
("xen: disable PV spinlocks on HVM") wherein it mentioned
PV spinlocks cannot possibly work with the current code because they are
enabled after pvops patching has already been done, and because PV
spinlocks use a different data structure than native spinlocks so we
cannot switch between them dynamically.
The first problem is solved by this patch.
The second problem has been solved by commit
816434ec4a674fcdb3c2221a6dffdc8f34020550
(Merge branch 'x86-spinlocks-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip)
P.S.
There is still the commit
70dd4998cb85f0ecd6ac892cc7232abefa432efb
(xen/spinlock: Disable IRQ spinlock (PV) allocation on PVHVM) to
revert but that can be done later after all other bugs have been
fixed.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Konrad Rzeszutek Wilk [Tue, 13 Aug 2013 15:53:35 +0000 (11:53 -0400)]
xen/spinlock: We don't need the old structure anymore
As we are using the generic ticketlock structs and these
old structures are not needed anymore.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Konrad Rzeszutek Wilk [Tue, 13 Aug 2013 15:47:21 +0000 (11:47 -0400)]
xen/spinlock: Fix locking path engaging too soon under PVHVM.
The xen_lock_spinning has a check for the kicker interrupts
and if it is not initialized it will spin normally (not enter
the slowpath).
But for PVHVM case we would initialize the kicker interrupt
before the CPU came online. This meant that if the booting
CPU used a spinlock and went in the slowpath - it would
enter the slowpath and block forever. The forever part because
during bootup: the spinlock would be taken _before_ the CPU
sets itself to be online (more on this further), and we enter
to poll on the event channel forever.
The bootup CPU (see commit
fc78d343fa74514f6fd117b5ef4cd27e4ac30236
"xen/smp: initialize IPI vectors before marking CPU online"
for details) and the CPU that started the bootup consult
the cpu_online_mask to determine whether the booting CPU should
get an IPI. The booting CPU has to set itself in this mask via:
set_cpu_online(smp_processor_id(), true);
However, if the spinlock is taken before this (and it is) and
it polls on an event channel - it will never be woken up as
the kernel will never send an IPI to an offline CPU.
Note that the PVHVM logic in sending IPIs is using the HVM
path which has numerous checks using the cpu_online_mask
and cpu_active_mask. See above mention git commit for details.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Konrad Rzeszutek Wilk [Mon, 9 Sep 2013 16:05:37 +0000 (12:05 -0400)]
Merge tag 'v3.11-rc7' into stable/for-linus-3.12
Linux 3.11-rc7
As we need the git commit
28817e9de4f039a1a8c1fe1df2fa2df524626b9e
Author: Chuck Anderson <chuck.anderson@oracle.com>
Date: Tue Aug 6 15:12:19 2013 -0700
xen/smp: initialize IPI vectors before marking CPU online
* tag 'v3.11-rc7': (443 commits)
Linux 3.11-rc7
ARC: [lib] strchr breakage in Big-endian configuration
VFS: collect_mounts() should return an ERR_PTR
bfs: iget_locked() doesn't return an ERR_PTR
efs: iget_locked() doesn't return an ERR_PTR()
proc: kill the extra proc_readfd_common()->dir_emit_dots()
cope with potentially long ->d_dname() output for shmem/hugetlb
usb: phy: fix build breakage
USB: OHCI: add missing PCI PM callbacks to ohci-pci.c
staging: comedi: bug-fix NULL pointer dereference on failed attach
lib/lz4: correct the LZ4 license
memcg: get rid of swapaccount leftovers
nilfs2: fix issue with counting number of bio requests for BIO_EOPNOTSUPP error detection
nilfs2: remove double bio_put() in nilfs_end_bio_write() for BIO_EOPNOTSUPP error
drivers/platform/olpc/olpc-ec.c: initialise earlier
ipv4: expose IPV4_DEVCONF
ipv6: handle Redirect ICMP Message with no Redirected Header option
be2net: fix disabling TX in be_close()
Revert "ACPI / video: Always call acpi_video_init_brightness() on init"
Revert "genetlink: fix family dump race"
...
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Linus Torvalds [Mon, 9 Sep 2013 16:05:33 +0000 (09:05 -0700)]
Merge tag 'arc-v3.12-rc1' of git://git./linux/kernel/git/vgupta/arc
Pull ARC changes from Vineet Gupta:
- ARC MM changes:
- preparation for MMUv4 (accomodate new PTE bits, new cmds)
- Rework the ASID allocation algorithm to remove asid-mm reverse map
- Boilerplate code consolidation in Exception Handlers
- Disable FRAME_POINTER for ARC
- Unaligned Access Emulation for Big-Endian from Noam
- Bunch of fixes (udelay, missing accessors) from Mischa
* tag 'arc-v3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: fix new Section mismatches in build (post __cpuinit cleanup)
Kconfig.debug: Add FRAME_POINTER anti-dependency for ARC
ARC: Fix __udelay calculation
ARC: remove console_verbose() from setup_arch()
ARC: Add read*_relaxed to asm/io.h
ARC: Handle un-aligned user space access in BE.
ARC: [ASID] Track ASID allocation cycles/generations
ARC: [ASID] activate_mm() == switch_mm()
ARC: [ASID] get_new_mmu_context() to conditionally allocate new ASID
ARC: [ASID] Refactor the TLB paranoid debug code
ARC: [ASID] Remove legacy/unused debug code
ARC: No need to flush the TLB in early boot
ARC: MMUv4 preps/3 - Abstract out TLB Insert/Delete
ARC: MMUv4 preps/2 - Reshuffle PTE bits
ARC: MMUv4 preps/1 - Fold PTE K/U access flags
ARC: Code cosmetics (Nothing semantical)
ARC: Entry Handler tweaks: Optimize away redundant IRQ_DISABLE_SAVE
ARC: Exception Handlers Code consolidation
ARC: Add some .gitignore entries
Bartlomiej Zolnierkiewicz [Fri, 30 Aug 2013 11:17:29 +0000 (13:17 +0200)]
of/platform: add error reporting to of_amba_device_create()
Add error reporting to of_amba_device_create() so the user knows
when (and why) some device tree nodes fail to initialize.
[ The issue was spotted on Universal C210 board (using revision 0 of
ARM Exynos4210 SoC) on which initialization was silently failing
for PL330 MDMA1 device tree node (it was using the wrong addres
resulting in amba_device_add() returning -ENODEV). ]
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Linus Torvalds [Mon, 9 Sep 2013 16:04:46 +0000 (09:04 -0700)]
Merge branch 'for-next' of git://git./linux/kernel/git/gerg/m68knommu
Pull m68knommu fixes from Greg Ungerer:
"Just a small collection of cleanups and fixes this time, no big
changes. The most interresting are to make the m68k and m68knommu
consistently use CONFIG_IOMAP, clean out some unused board config
options and flush the cache on signal stack creation"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
m68k: remove 16 unused boards in Kconfig.machine
m68k: define 'VM_DATA_DEFAULT_FLAGS' no matter whether has 'NOMMU' or not
m68knommu: user generic iomap to support ioread*/iowrite*
m68k/coldfire: flush cache when creating the signal stack frame
m68knommu: Mark functions only called from setup_arch() __init
Linus Torvalds [Mon, 9 Sep 2013 16:03:46 +0000 (09:03 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/rw/uml
Pull UML updates from Richard Weinberger:
"This pile contains mostly fixes and improvements for issues identified
by Richard W M Jones while adding UML as backend to libguestfs"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
um: Add irq chip um/mask handlers
um: prctl: Do not include linux/ptrace.h
um: Run UML in it's own session.
um: Cleanup SIGTERM handling
um: ubd: Introduce submit_request()
um: ubd: Add REQ_FLUSH suppport
um: Implement probe_kernel_read()
um: hostfs: Fix writeback
Yijing Wang [Sat, 31 Aug 2013 01:44:10 +0000 (09:44 +0800)]
irq/of: Fix comment typo for irq_of_parse_and_map
Fix trivial comment typo for irq_of_parse_and_map().
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Konrad Rzeszutek Wilk [Mon, 9 Sep 2013 16:01:15 +0000 (12:01 -0400)]
Merge branch 'x86/spinlocks' of git://git./linux/kernel/git/tip/tip into stable/for-linus-3.12
* 'x86/spinlocks' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/kvm/guest: Fix sparse warning: "symbol 'klock_waiting' was not declared as static"
kvm: Paravirtual ticketlocks support for linux guests running on KVM hypervisor
kvm guest: Add configuration support to enable debug information for KVM Guests
kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi
xen, pvticketlock: Allow interrupts to be enabled while blocking
x86, ticketlock: Add slowpath logic
jump_label: Split jumplabel ratelimit
x86, pvticketlock: When paravirtualizing ticket locks, increment by 2
x86, pvticketlock: Use callee-save for lock_spinning
xen, pvticketlocks: Add xen_nopvspin parameter to disable xen pv ticketlocks
xen, pvticketlock: Xen implementation for PV ticket locks
xen: Defer spinlock setup until boot CPU setup
x86, ticketlock: Collapse a layer of functions
x86, ticketlock: Don't inline _spin_unlock when using paravirt spinlocks
x86, spinlock: Replace pv spinlocks with pv ticketlocks
Julien Grall [Mon, 9 Sep 2013 11:35:26 +0000 (11:35 +0000)]
xen/arm: disable cpuidle and cpufreq when linux is running as dom0
When linux is running as dom0, Xen doesn't show the physical cpu but a
virtual CPU.
On some ARM SOC (for instance the exynos 5250), linux registers callbacks
for cpuidle and cpufreq. When these callbacks are called, they will modify
directly the physical cpu not the virtual one. It can impact the whole board
instead of only dom0.
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Boris Ostrovsky [Mon, 9 Sep 2013 10:44:26 +0000 (10:44 +0000)]
xen/p2m: Don't call get_balloon_scratch_page() twice, keep interrupts disabled for multicalls
m2p_remove_override() calls get_balloon_scratch_page() in
MULTI_update_va_mapping() even though it already has pointer to this page from
the earlier call (in scratch_page). This second call doesn't have a matching
put_balloon_scratch_page() thus not restoring preempt count back. (Also, there
is no put_balloon_scratch_page() in the error path.)
In addition, the second multicall uses __xen_mc_entry() which does not disable
interrupts. Rearrange xen_mc_* calls to keep interrupts off while performing
multicalls.
This commit fixes a regression introduced by:
commit
ee0726407feaf504dff304fb603652fb2d778b42
Author: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Date: Tue Jul 23 17:23:54 2013 +0000
xen/m2p: use GNTTABOP_unmap_and_replace to reinstate the original mapping
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Rob Herring [Thu, 29 Aug 2013 12:43:52 +0000 (07:43 -0500)]
ARM: xen: only set pm function ptrs for Xen guests
xen_pm_init was unconditionally setting pm_power_off and arm_pm_restart
function pointers. This breaks multi-platform kernels. Make this
conditional on running as a Xen guest and make it a late_initcall to
ensure it is setup after platform code for Dom0.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
CC: stable@vger.kernel.org
Heiko Carstens [Mon, 9 Sep 2013 05:44:43 +0000 (07:44 +0200)]
s390/irq: reduce size of external interrupt handler hash array
Change the hash algorithm a bit so it produces only values in the
range of 0..31.
This allows to reduce the size of the external interrupt handler hash
array even further while making sure that each of the known interrupt
sources keeps its unique hash with the slightly modified algorithm:
0x1004 --> 12
0x1201 --> 10
0x1202 --> 11
0x1406 --> 16
0x1407 --> 17
0x2401 --> 19
0x2603 --> 22
0x4000 --> 0
This also means that the entire array now fits into exactly one cache
line; so add a proper align statement as well.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Ian Kent [Sun, 8 Sep 2013 08:47:23 +0000 (16:47 +0800)]
autofs4 - fix device ioctl mount lookup
When reconnecting to automounts at startup an autofs ioctl is used
to find the device and inode of existing mounts so they can be used
to open a file descriptor of possibly covered mounts.
At this time the the caller might not yet "own" the mount so it can
trigger calling ->d_automount(). This causes automount to hang when
trying to reconnect to direct or offset mount types.
Consequently kern_path() can't be used but kern_path_mountpoint() can be.
Signed-off-by: Ian Kent <raven@themaw.net>
Cc: Jeff Layton <jlayton@redhat.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linus Torvalds [Mon, 9 Sep 2013 01:13:49 +0000 (18:13 -0700)]
vfs: fix dentry RCU to refcounting possibly sleeping dput()
This is the fix that the last two commits indirectly led up to - making
sure that we don't call dput() in a bad context on the dentries we've
looked up in RCU mode after the sequence count validation fails.
This basically expands d_rcu_to_refcount() into the callers, and then
fixes the callers to delay the dput() in the failure case until _after_
we've dropped all locks and are no longer in an RCU-locked region.
The case of 'complete_walk()' was trivial, since its failure case did
the unlock_rcu_walk() directly after the call to d_rcu_to_refcount(),
and as such that is just a pure expansion of the function with a trivial
movement of the resulting dput() to after 'unlock_rcu_walk()'.
In contrast, the unlazy_walk() case was much more complicated, because
not only does convert two different dentries from RCU to be reference
counted, but it used to not call unlock_rcu_walk() at all, and instead
just returned an error and let the caller clean everything up in
"terminate_walk()".
Happily, one of the dentries in question (called "parent" inside
unlazy_walk()) is the dentry of "nd->path", which terminate_walk() wants
a refcount to anyway for the non-RCU case.
So what the new and improved unlazy_walk() does is to first turn that
dentry into a refcounted one, and once that is set up, the error cases
can continue to use the terminate_walk() helper for cleanup, but for the
non-RCU case. Which makes it possible to drop out of RCU mode if we
actually hit the sequence number failure case.
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Aaron Lu [Mon, 9 Sep 2013 00:27:12 +0000 (09:57 +0930)]
virtio_pci: pm: Use CONFIG_PM_SLEEP instead of CONFIG_PM
The virtio_pci_freeze/restore are defined under CONFIG_PM but is used
by SET_SYSTEM_SLEEP_PM_OPS macro, which is defined under
CONFIG_PM_SLEEP. So if CONFIG_PM_SLEEP is not cofigured but
CONFIG_PM_RUNTIME is, the following warning message appeared:
drivers/virtio/virtio_pci.c:770:12: warning: ‘virtio_pci_freeze’ defined but not used [-Wunused-function]
static int virtio_pci_freeze(struct device *dev)
^
drivers/virtio/virtio_pci.c:790:12: warning: ‘virtio_pci_restore’ defined but not used [-Wunused-function]
static int virtio_pci_restore(struct device *dev)
^
Fix it by changing CONFIG_PM to CONFIG_PM_SLEEP.
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Al Viro [Mon, 9 Sep 2013 00:18:44 +0000 (20:18 -0400)]
introduce kern_path_mountpoint()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 8 Sep 2013 18:03:27 +0000 (14:03 -0400)]
rename user_path_umountat() to user_path_mountpoint_at()
... and move the extern from linux/namei.h to fs/internal.h,
along with that of vfs_path_lookup().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 8 Sep 2013 17:41:33 +0000 (13:41 -0400)]
take unlazy_walk() into umount_lookup_last()
... and massage it a bit to reduce nesting
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linus Torvalds [Sun, 8 Sep 2013 20:46:52 +0000 (13:46 -0700)]
vfs: use lockred "dead" flag to mark unrecoverably dead dentries
This simplifies the RCU to refcounting code in particular.
I was originally intending to leave this for later, but walking through
all the dput() logic (see previous commit), I realized that the dput()
"might_sleep()" check was misleadingly weak. And I removed it as
misleading, both for performance profiling and for debugging.
However, the might_sleep() debugging case is actually true: the final
dput() can indeed sleep, if the inode of the dentry that you are
releasing ends up sleeping at iput time (see dentry_iput()). So the
problem with the might_sleep() in dput() wasn't that it wasn't true, it
was that it wasn't actually testing and triggering on the interesting
case.
In particular, just about *any* dput() can indeed sleep, if you happen
to race with another thread deleting the file in question, and you then
lose the race to the be the last dput() for that file. But because it's
a very rare race, the debugging code would never trigger it in practice.
Why is this problematic? The new d_rcu_to_refcount() (see commit
15570086b590: "vfs: reimplement d_rcu_to_refcount() using
lockref_get_or_lock()") does a dput() for the failure case, and it does
it under the RCU lock. So potentially sleeping really is a bug.
But there's no way I'm going to fix this with the previous complicated
"lockref_get_or_lock()" interface. And rather than revert to the old
and crufty nested dentry locking code (which did get this right by
delaying the reference count updates until they were verified to be
safe), let's make forward progress.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sun, 8 Sep 2013 20:26:18 +0000 (13:26 -0700)]
vfs: reorganize dput() memory accesses
This is me being a bit OCD after all the dentry optimization work this
merge window: profiles end up showing 'dput()' as a rather expensive
operation, and there were two unrelated bad reasons for that.
The first reason was reading d_lockref.count for debugging purposes,
which touches the lockref cacheline (for reads) before really need to.
More importantly, the debugging test in question is _wrong_, and has
hidden bugs. It's true that we can only sleep when the count goes down
to zero, but the test as-is hides the much more subtle bug that happens
if we race with somebody else deleting the file.
Anyway we _will_ touch that cacheline, but let's do it for a write and
in the right routine (ie in "lockref_put_or_lock()") which annotates the
costs better. So remove the misleading debug code.
The other was an unnecessary access to the cacheline that contains the
d_lru list, just to check whether we already were on the LRU list or
not. This is exactly what we have d_flags for, so that we can avoid
touching extra cache lines for the common case. So just add another bit
for "is this dentry on the LRU".
Finally, mark the tests properly likely/unlikely, so that the common
fast-paths are dense in the instruction stream.
This makes the profiles look much saner.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sun, 8 Sep 2013 03:19:02 +0000 (20:19 -0700)]
Merge git://git.infradead.org/users/willy/linux-nvme
Pull NVM Express driver update from Matthew Wilcox.
* git://git.infradead.org/users/willy/linux-nvme:
NVMe: Merge issue on character device bring-up
NVMe: Handle ioremap failure
NVMe: Add pci suspend/resume driver callbacks
NVMe: Use normal shutdown
NVMe: Separate controller init from disk discovery
NVMe: Separate queue alloc/free from create/delete
NVMe: Group pci related actions in functions
NVMe: Disk stats for read/write commands only
NVMe: Bring up cdev on set feature failure
NVMe: Fix checkpatch issues
NVMe: Namespace IDs are unsigned
NVMe: Update nvme_id_power_state with latest spec
NVMe: Split header file into user-visible and kernel-visible pieces
NVMe: Call nvme_process_cq from submission path
NVMe: Remove "process_cq did something" message
NVMe: Return correct value from interrupt handler
NVMe: Disk IO statistics
NVMe: Restructure MSI / MSI-X setup
NVMe: Use kzalloc instead of kmalloc+memset