Jiri Slaby [Wed, 20 Apr 2011 08:43:14 +0000 (10:43 +0200)]
Char: nozomi, remove useless tty_sem
tty_sem used to protect tty open count. This was removed in
33dd474a
but the lock remained in place.
So remove it completely as it protects nothing now.
Also this solves Mac's problem with inatomic operation called from
atomic context (ppp):
BUG: scheduling while atomic: firefox-bin/1992/0x10000800
Modules linked in: ...
Pid: 1992, comm: firefox-bin Not tainted 2.6.38 #1
Call Trace:
...
[] ? mutex_lock+0xe/0x21
[] ? ntty_write+0x5d/0x192 [nozomi]
[] ? __mod_timer.clone.30+0xbe/0xcc
[] ? check_preempt_curr+0x60/0x6d
[] ? __nf_ct_refresh_acct+0x75/0xbe
[] ? ppp_async_push+0xa9/0x3bd [ppp_async]
[] ? ppp_async_send+0x34/0x40 [ppp_async]
[] ? ppp_push+0x6c/0x4f9 [ppp_generic]
...
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reported-by: Mac <kmac@poczta.fm>
Tested-by: Gerald Pfeifer <gerald@pfeifer.com>
Reviewed-by: Jack Stone <jwjstone@fastmail.fm>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 20 Apr 2011 08:43:13 +0000 (10:43 +0200)]
Char: nozomi, remove port.count checks
Before
33dd474a, these were some kind of protection against race with
HUP. They were protected with port->tty_sem at the same time.
By that commit, the counting was switched to tty_port's one, but the
locking remained the old one. So the count was not protected by
any lock anymore.
The driver should not test whether it raced with HUP or not anyways.
With the new refcounted tty model, it just should proceed as nothing
happened because all needed info is still there. In respect to this,
let's drop the useless and unprotected tests (tty_port->count is
protected by tty_port->lock).
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Tested-by: Gerald Pfeifer <gerald@pfeifer.com>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 20 Apr 2011 08:43:12 +0000 (10:43 +0200)]
Char: nozomi, use GFP_KERNEL for kfifo allocation
The allocation was moved to probe function in
9842c38e9176. And we can
sleep there. So allocate the 4*8192 bytes as GFP_KERNEL to mitigate
the allocation failure.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Tested-by: Gerald Pfeifer <gerald@pfeifer.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Felipe Balbi [Mon, 21 Mar 2011 10:25:08 +0000 (12:25 +0200)]
tty: make receive_buf() return the amout of bytes received
it makes it simpler to keep track of the amount of
bytes received and simplifies how flush_to_ldisc counts
the remaining bytes. It also fixes a bug of lost bytes
on n_tty when flushing too many bytes via the USB
serial gadget driver.
Tested-by: Stefan Bigler <stefan.bigler@keymile.com>
Tested-by: Toby Gray <toby.gray@realvnc.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Govindraj.R [Mon, 18 Apr 2011 14:57:35 +0000 (20:27 +0530)]
Serial: Remove unused code.
Remove stale code in serial_core layer.
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Petr Písař [Fri, 15 Apr 2011 08:08:08 +0000 (10:08 +0200)]
tty: Clean console safely
Traditional \E[2J sequence erases console display but scroll-back
buffer and underlying device (frame) buffer keep data that can be
accessed by scrolling console back.
This patch introduce new \E[J parameter 3 that allows to scramble
scroll-back buffer explicitly. Session locking programs (screen,
vlock) can use it to prevent attacker to browse locked console
history.
Signed-off-by: Petr Písař <ppisar@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jesper Juhl [Sun, 10 Apr 2011 17:22:34 +0000 (19:22 +0200)]
Serial: ifx6x60c: Remove duplicate includes of linux/tty.h
Including linux/tty.h 3 times is a little over the top - once will do.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jovi Zhang [Wed, 30 Mar 2011 09:30:41 +0000 (05:30 -0400)]
tty: remove invalid location line in file header
remove invalid location line in each file header after location
moved from driver/char to driver/tty
Signed-off-by: Jovi Zhang <bookjovi@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Tue, 29 Mar 2011 22:10:57 +0000 (00:10 +0200)]
serial: core, remove uart_update_termios
Now, uart_update_termios is empty, so it's time to remove it. We no
longer need a live tty in .dtr_rts. So this should prune all the bugs
where tty is zeroed in port->tty during tty_port_block_til_ready.
There is one thing to note. We don't set ASYNC_NORMAL_ACTIVE now. It's
because this is done already in tty_port_block_til_ready.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Tue, 29 Mar 2011 22:10:56 +0000 (00:10 +0200)]
serial: core, do not set DTR/RTS twice on startup
In .dtr_rts we do:
uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS)
and call uart_update_termios. It does:
uart_set_mctrl(port, TIOCM_DTR | TIOCM_RTS)
once again. As the only callsite of uart_update_termios is .dtr_rts,
remove the uart_set_mctrl from uart_update_termios to not set it twice.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Tue, 29 Mar 2011 22:10:55 +0000 (00:10 +0200)]
serial: core, move termios handling to uart_startup
We should not fiddle with speed and cflags in .dtr_rts hook. Actually
we might not have tty at that moment already.
So move the console cflag copy and speed setup into uart_startup.
Actually the speed setup is already there, but we need to call it
unconditionally (uart_startup is called from uart_open with hw_init =
0).
This means we move uart_change_speed before dtr/rts setup in .dtr_rts.
But this should not matter as the setup should be called after
uart_change_speed anyway.
Before: After:
dtr/rts setup (dtr_rts) uart_change_speed (startup)
uart_change_speed (update_termios) dtr/rts setup (dtr_rts)
dtr/rts setup (update_termios) dtr/rts setup (update_termios)
The second setup will dismiss with the next patch.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Tue, 29 Mar 2011 21:23:41 +0000 (23:23 +0200)]
Char: moxa, do not touch NORMAL_ACTIVE bit
The bit is set in tty_port_block_til_ready (via moxa_open) and unset
in tty_port_close (via moxa_close). No need to pin it in the driver.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Tobias Klauser [Mon, 28 Mar 2011 11:57:11 +0000 (13:57 +0200)]
serial: altera_uart: Scan for a free port if platform device id is -1
Devices extracted from device tree all seem to have pdev->id set to -1.
Up until now we mapped all devices with id -1 to the first device. This
behaviour could lead to problems when using more than one Altera UART in
a system.
This patch changes the behaviour of the driver to scan for the next free
id in case the id is -1.
Because we cannot refer back to the assigned id in altera_uart_remove,
the port instance needs to be stored in device drvdata.
Reported-by: David Smoot <davidsmoot@gmail.com>
Cc: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 23 Mar 2011 09:48:37 +0000 (10:48 +0100)]
TTY: fix fail path in tty_open
When tty_add_file fails we omit to clean up. Fix that by calling
tty_release appropriatelly.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 23 Mar 2011 09:48:36 +0000 (10:48 +0100)]
TTY: plug in deinitialize_tty_struct
Used the newly introduced deinitialize_tty_struct to properly shut
down ldisc.
It is intended to fix the Julian's reported problem. He reports that
kmemleak checker warns about memory leak:
unreferenced object 0xc0e19860 (size 8):
comm cat, pid 1226, jiffies
4294919464 (age 287.476s)
hex dump (first 8 bytes):
44 de 2d c1 01 00 00 00 D.-.....
backtrace:
[<
c1065a74>] create_object+0x109/0x1ad
[<
c1063d2b>] kmem_cache_alloc+0x60/0x68
[<
c113505c>] tty_ldisc_get+0x54/0x76
[<
c11358c9>] tty_ldisc_init+0xa/0x20
[<
c1130ab4>] initialize_tty_struct+0x2d/0x1ac
[<
c1130c8c>] tty_init_dev+0x59/0x10d
[<
c113136d>] tty_open+0x24a/0x3a2
...
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Reported-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 23 Mar 2011 09:48:35 +0000 (10:48 +0100)]
TTY: introduce deinit helpers for proper ldisc shutdown
Introduce deinitialize_tty_struct which should be called after
initialize_tty_struct and before successfull tty_ldisc_setup.
It calls tty_ldisc_deinit which is opposite of tty_ldisc_init. It only
puts a reference to ldisc and assigns NULL to tty->ldisc.
It will be used to shut down ldisc when tty_release cannot be called
yet.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 23 Mar 2011 09:48:34 +0000 (10:48 +0100)]
TTY: unify pty_unix98_install fail path handling
Change it so that we call the deinit functions at one place at the end
of the function (by gotos). And while at it use some sane label names.
This is a preparation for the deinitialization of tty in the next
patch.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 23 Mar 2011 09:48:33 +0000 (10:48 +0100)]
TTY: unify pty_install fail path handling
Change it so that we call the deinit functions at one place at the end
of the function (by gotos). And while at it use some sane label names.
This is a preparation for the deinitialization of tty in the next
patch.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 23 Mar 2011 09:48:32 +0000 (10:48 +0100)]
TTY: unify tty_init_dev fail path handling
Change it so that we call the deinit functions at one place at the end
of the function (by gotos). And while at it use some sane label names.
This is a preparation for the deinitialization of tty in the next
patch.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 23 Mar 2011 08:50:00 +0000 (09:50 +0100)]
TTY: rocket, remove unused variables
drivers/tty/rocket.c:1393:2: warning: Value stored to 'cp' is never read
cp = &info->channel;
^ ~~~~~~~~~~~~~~
drivers/tty/rocket.c:1412:2: warning: Value stored to 'cp' is never read
cp = &info->channel;
^ ~~~~~~~~~~~~~~
drivers/tty/rocket.c:1730:2: warning: Value stored to 'cp' is never read
cp = &info->channel;
^ ~~~~~~~~~~~~~~
drivers/tty/rocket.c:1825:3: warning: Value stored to 'str' is never read
str = "8";
^ ~~~
[many 'str' warnings stripped]
drivers/tty/rocket.c:2037:3: warning: Value stored to 'board_type' is never read
board_type = "RocketModem";
^ ~~~~~~~~~~~~~
[some 'board_type' warnings stripped]
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 23 Mar 2011 08:49:59 +0000 (09:49 +0100)]
Char: moxa, remove unused variables
drivers/tty/moxa.c:1287:2: warning: Value stored to 'port' is never read
port = tty->index;
^ ~~~~~~~~~~
drivers/tty/moxa.c:1763:2: warning: Value stored to 'cflag' is never read
cflag = termio->c_cflag; /* termio->c_cflag */
^ ~~~~~~~~~~~~~~~
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 23 Mar 2011 08:49:57 +0000 (09:49 +0100)]
TTY: VT, remove unused variables
drivers/tty/vt/vt.c:892:2: warning: Value stored to 'old_screen_size' is never read
old_screen_size = vc->vc_screenbuf_size;
^ ~~~~~~~~~~~~~~~~~~~~~
drivers/tty/vt/vt.c:890:2: warning: Value stored to 'old_cols' is never read
old_cols = vc->vc_cols;
^ ~~~~~~~~~~~
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 23 Mar 2011 08:49:56 +0000 (09:49 +0100)]
Char: cyclades, fix unused variable
drivers/tty/cyclades.c:1454:2: warning: Value stored to 'channel' is never read
channel = info->line - card->first_line;
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fix it by moving it to the appropriate debug section where it is used.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 23 Mar 2011 08:49:55 +0000 (09:49 +0100)]
TTY: serial_core, remove unused variable
drivers/tty/serial/serial_core.c:1980:2: warning: Value stored to 'tty' is never read
tty = port->tty;
^ ~~~~~~~~~
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Govindraj.R <govindraj.raja@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Wed, 23 Mar 2011 08:49:54 +0000 (09:49 +0100)]
tty: VT, remove unused variable
drivers/tty/vt/vt_ioctl.c:1525:2: warning: Value stored to 'kbd' is never read
kbd = kbd_table + console;
^ ~~~~~~~~~~~~~~~~~~~
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Andrew Morton [Thu, 7 Apr 2011 23:13:01 +0000 (16:13 -0700)]
drivers/tty/vt/vt_ioctl.c: repair insane ?: expression
Cc: Arthur Taylor <art@ified.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Arthur Taylor [Thu, 17 Mar 2011 08:47:32 +0000 (01:47 -0700)]
vt: Add K_OFF return value to vt_ioctl KDGKBMODE
After adding support for K_OFF in KDSKBMODE, it was forgotten to
add support for returning it in KDGKBMODE.
Signed-off-by: Arthur Taylor <art@ified.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Herton Ronaldo Krzesinski [Thu, 31 Mar 2011 18:35:31 +0000 (15:35 -0300)]
vt: remove uneeded retval check before tty->ops->open inside tty_open
The current check is uneeded, since !retval will always returns true,
as retval returned from tty_add_file is checked earlier and tty_open
exits if it's not zero.
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Linus Torvalds [Tue, 19 Apr 2011 04:26:00 +0000 (21:26 -0700)]
Linux 2.6.39-rc4
Linus Torvalds [Mon, 18 Apr 2011 22:44:29 +0000 (15:44 -0700)]
Merge branch 'for-39-rc4' of git://codeaurora.org/quic/kernel/davidb/linux-msm
* 'for-39-rc4' of git://codeaurora.org/quic/kernel/davidb/linux-msm:
msm: timer: fix missing return value
msm: Remove extraneous ffa device check
Linus Torvalds [Mon, 18 Apr 2011 20:29:03 +0000 (13:29 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: xen-kbdfront - fix mouse getting stuck after save/restore
Input: estimate number of events per packet
Input: evdev - indicate buffer overrun with SYN_DROPPED
Input: document event types and codes and their intended use
Input: add KEY_IMAGES specifically for AL Image Browser
Input: twl4030_keypad - fix potential NULL dereference in twl4030_kp_probe()
Input: h3600_ts - fix error handling at connect
Input: twl4030_keypad - avoid potential NULL-pointer dereference
Linus Torvalds [Mon, 18 Apr 2011 20:21:18 +0000 (13:21 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
block: add blk_run_queue_async
block: blk_delay_queue() should use kblockd workqueue
md: fix up raid1/raid10 unplugging.
md: incorporate new plugging into raid5.
md: provide generic support for handling unplug callbacks.
md - remove old plugging code.
md/dm - remove remains of plug_fn callback.
md: use new plugging interface for RAID IO.
block: drop queue lock before calling __blk_run_queue() for kblockd punt
Revert "block: add callback function for unplug notification"
block: Enhance new plugging support to support general callbacks
Linus Torvalds [Mon, 18 Apr 2011 19:24:24 +0000 (12:24 -0700)]
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/powermac: Build fix with SMP and CPU hotplug
powerpc/perf_event: Skip updating kernel counters if register value shrinks
powerpc: Don't write protect kernel text with CONFIG_DYNAMIC_FTRACE enabled
powerpc: Fix oops if scan_dispatch_log is called too early
powerpc/pseries: Use a kmem cache for DTL buffers
powerpc/kexec: Fix regression causing compile failure on UP
powerpc/85xx: disable Suspend support if SMP enabled
powerpc/e500mc: Remove CPU_FTR_MAYBE_CAN_NAP/CPU_FTR_MAYBE_CAN_DOZE
powerpc/book3e: Fix CPU feature handling on 64-bit e5500
powerpc: Check device status before adding serial device
powerpc/85xx: Don't add disabled PCIe devices
Linus Torvalds [Mon, 18 Apr 2011 19:24:05 +0000 (12:24 -0700)]
Merge git://git./linux/kernel/git/mason/btrfs-unstable
* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (24 commits)
Btrfs: fix free space cache leak
Btrfs: avoid taking the chunk_mutex in do_chunk_alloc
Btrfs end_bio_extent_readpage should look for locked bits
Btrfs: don't force chunk allocation in find_free_extent
Btrfs: Check validity before setting an acl
Btrfs: Fix incorrect inode nlink in btrfs_link()
Btrfs: Check if btrfs_next_leaf() returns error in btrfs_real_readdir()
Btrfs: Check if btrfs_next_leaf() returns error in btrfs_listxattr()
Btrfs: make uncache_state unconditional
btrfs: using cached extent_state in set/unlock combinations
Btrfs: avoid taking the trans_mutex in btrfs_end_transaction
Btrfs: fix subvolume mount by name problem when default mount subvolume is set
fix user annotation in ioctl.c
Btrfs: check for duplicate iov_base's when doing dio reads
btrfs: properly handle overlapping areas in memmove_extent_buffer
Btrfs: fix memory leaks in btrfs_new_inode()
Btrfs: check for duplicate iov_base's when doing dio reads
Btrfs: reuse the extent_map we found when calling btrfs_get_extent
Btrfs: do not use async submit for small DIO io's
Btrfs: don't split dio bios if we don't have to
...
Linus Torvalds [Mon, 18 Apr 2011 17:36:54 +0000 (10:36 -0700)]
proc: do proper range check on readdir offset
Rather than pass in some random truncated offset to the pid-related
functions, check that the offset is in range up-front.
This is just cleanup, the previous commit fixed the real problem.
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Mon, 18 Apr 2011 17:35:30 +0000 (10:35 -0700)]
next_pidmap: fix overflow condition
next_pidmap() just quietly accepted whatever 'last' pid that was passed
in, which is not all that safe when one of the users is /proc.
Admittedly the proc code should do some sanity checking on the range
(and that will be the next commit), but that doesn't mean that the
helper functions should just do that pidmap pointer arithmetic without
checking the range of its arguments.
So clamp 'last' to PID_MAX_LIMIT. The fact that we then do "last+1"
doesn't really matter, the for-loop does check against the end of the
pidmap array properly (it's only the actual pointer arithmetic overflow
case we need to worry about, and going one bit beyond isn't going to
overflow).
[ Use PID_MAX_LIMIT rather than pid_max as per Eric Biederman ]
Reported-by: Tavis Ormandy <taviso@cmpxchg8b.com>
Analyzed-by: Robert Święcki <robert@swiecki.net>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Igor Mammedov [Mon, 18 Apr 2011 17:17:17 +0000 (10:17 -0700)]
Input: xen-kbdfront - fix mouse getting stuck after save/restore
Mouse gets "stuck" after restore of PV guest but buttons are in working
condition.
If driver has been configured for ABS coordinates at start it will get
XENKBD_TYPE_POS events and then suddenly after restore it'll start getting
XENKBD_TYPE_MOTION events, that will be dropped later and they won't get
into user-space.
Regression was introduced by hunk 5 and 6 of
5ea5254aa0ad269cfbd2875c973ef25ab5b5e9db
("Input: xen-kbdfront - advertise either absolute or relative
coordinates").
Driver on restore should ask xen for request-abs-pointer again if it is
available. So restore parts that did it before
5ea5254.
Acked-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
[v1: Expanded the commit description]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Jeff Brown [Mon, 18 Apr 2011 17:08:02 +0000 (10:08 -0700)]
Input: estimate number of events per packet
Calculate a default based on the number of ABS axes, REL axes,
and MT slots for the device during input device registration.
Signed-off-by: Jeff Brown <jeffbrown@android.com>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Chris Mason [Mon, 18 Apr 2011 12:55:34 +0000 (08:55 -0400)]
Btrfs: fix free space cache leak
The free space caching code was recently reworked to
cache all the pages it needed instead of using find_get_page everywhere.
One loop was missed though, so it ended up leaking pages. This fixes
it to use our page array instead of find_get_page.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Christoph Hellwig [Mon, 18 Apr 2011 09:41:33 +0000 (11:41 +0200)]
block: add blk_run_queue_async
Instead of overloading __blk_run_queue to force an offload to kblockd
add a new blk_run_queue_async helper to do it explicitly. I've kept
the blk_queue_stopped check for now, but I suspect it's not needed
as the check we do when the workqueue items runs should be enough.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Jens Axboe [Mon, 18 Apr 2011 09:36:39 +0000 (11:36 +0200)]
block: blk_delay_queue() should use kblockd workqueue
Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
NeilBrown [Mon, 18 Apr 2011 08:25:43 +0000 (18:25 +1000)]
md: fix up raid1/raid10 unplugging.
We just need to make sure that an unplug event wakes up the md
thread, which is exactly what mddev_check_plugged does.
Also remove some plug-related code that is no longer needed.
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown [Mon, 18 Apr 2011 08:25:43 +0000 (18:25 +1000)]
md: incorporate new plugging into raid5.
In raid5 plugging is used for 2 things:
1/ collecting writes that require a bitmap update
2/ collecting writes in the hope that we can create full
stripes - or at least more-full.
We now release these different sets of stripes when plug_cnt
is zero.
Also in make_request, we call mddev_check_plug to hopefully increase
plug_cnt, and wake up the thread at the end if plugging wasn't
achieved for some reason.
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown [Mon, 18 Apr 2011 08:25:42 +0000 (18:25 +1000)]
md: provide generic support for handling unplug callbacks.
When an md device adds a request to a queue, it can call
mddev_check_plugged.
If this succeeds then we know that the md thread will be woken up
shortly, and ->plug_cnt will be non-zero until then, so some
processing can be delayed.
If it fails, then no unplug callback is expected and the make_request
function needs to do whatever is required to make the request happen.
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown [Mon, 18 Apr 2011 08:25:42 +0000 (18:25 +1000)]
md - remove old plugging code.
md has some plugging infrastructure for RAID5 to use because the
normal plugging infrastructure required a 'request_queue', and when
called from dm, RAID5 doesn't have one of those available.
This relied on the ->unplug_fn callback which doesn't exist any more.
So remove all of that code, both in md and raid5. Subsequent patches
with restore the plugging functionality.
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown [Mon, 18 Apr 2011 08:25:41 +0000 (18:25 +1000)]
md/dm - remove remains of plug_fn callback.
Now that unplugging is done differently, the unplug_fn callback is
never called, so it can be completely discarded.
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown [Mon, 18 Apr 2011 08:25:41 +0000 (18:25 +1000)]
md: use new plugging interface for RAID IO.
md/raid submits a lot of IO from the various raid threads.
So adding start/finish plug calls to those so that some
plugging happens.
Signed-off-by: NeilBrown <neilb@suse.de>
Jens Axboe [Mon, 18 Apr 2011 07:59:55 +0000 (09:59 +0200)]
block: drop queue lock before calling __blk_run_queue() for kblockd punt
If we know we are going to punt to kblockd, we can drop the queue
lock before calling into __blk_run_queue() since it only does a
safe bit test and a workqueue call. Since kblockd needs to grab
this very lock as one of the first things it does, it's a good
optimization to drop the lock before waking kblockd.
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Jens Axboe [Mon, 18 Apr 2011 07:54:05 +0000 (09:54 +0200)]
Revert "block: add callback function for unplug notification"
MD can't use this since it really requires us to be able to
keep more than a single piece of state for the unplug. Commit
048c9374 added the required support for MD, so get rid of this
now unused code.
This reverts commit
f75664570d8b75469cc468f23c2b27220984983b.
Conflicts:
block/blk-core.c
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
NeilBrown [Mon, 18 Apr 2011 07:52:22 +0000 (09:52 +0200)]
block: Enhance new plugging support to support general callbacks
md/raid requires an unplug callback, but as it does not uses
requests the current code cannot provide one.
So allow arbitrary callbacks to be attached to the blk_plug.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Benjamin Herrenschmidt [Mon, 18 Apr 2011 05:46:35 +0000 (15:46 +1000)]
powerpc/powermac: Build fix with SMP and CPU hotplug
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Eric B Munson [Fri, 15 Apr 2011 08:12:30 +0000 (08:12 +0000)]
powerpc/perf_event: Skip updating kernel counters if register value shrinks
Because of speculative event roll back, it is possible for some event coutners
to decrease between reads on POWER7. This causes a problem with the way that
counters are updated. Delta calues are calculated in a 64 bit value and the
top 32 bits are masked. If the register value has decreased, this leaves us
with a very large positive value added to the kernel counters. This patch
protects against this by skipping the update if the delta would be negative.
This can lead to a lack of precision in the coutner values, but from my testing
the value is typcially fewer than 10 samples at a time.
Signed-off-by: Eric B Munson <emunson@mgebm.net>
Cc: stable@kernel.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Stefan Roese [Thu, 14 Apr 2011 23:49:53 +0000 (23:49 +0000)]
powerpc: Don't write protect kernel text with CONFIG_DYNAMIC_FTRACE enabled
This problem was noticed on an MPC855T platform. Ftrace did oops
when trying to write to the kernel text segment.
Many thanks to Joakim for finding the root cause of this problem.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Joakim Tjernlund <joakim.tjernlund@transmode.se>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Anton Blanchard [Thu, 7 Apr 2011 21:44:21 +0000 (21:44 +0000)]
powerpc: Fix oops if scan_dispatch_log is called too early
We currently enable interrupts before the dispatch log for the boot
cpu is setup. If a timer interrupt comes in early enough we oops in
scan_dispatch_log:
Unable to handle kernel paging request for data at address 0x00000010
...
.scan_dispatch_log+0xb0/0x170
.account_system_vtime+0xa0/0x220
.irq_enter+0x88/0xc0
.do_IRQ+0x48/0x230
The patch below adds a check to scan_dispatch_log to ensure the
dispatch log has been allocated.
Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: <stable@kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Nishanth Aravamudan [Wed, 13 Apr 2011 19:45:59 +0000 (19:45 +0000)]
powerpc/pseries: Use a kmem cache for DTL buffers
PAPR specifies that DTL buffers can not cross AMS environments (aka CMO
in the PAPR) and can not cross a memory entitlement granule boundary
(4k). This is found in section 14.11.3.2 H_REGISTER_VPA of the PAPR.
kmalloc does not guarantee an alignment of the allocation, though,
beyond 8 bytes (at least in my understanding). Create a special kmem
cache for DTL buffers with the alignment requirement.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Paul Gortmaker [Wed, 13 Apr 2011 06:30:08 +0000 (06:30 +0000)]
powerpc/kexec: Fix regression causing compile failure on UP
Recent commit
b987812b3fcaf70fdf0037589e5d2f5f2453e6ce caused
a compile failure on UP because a considerably large block
of the file was included within CONFIG_SMP, hence making a stub
function not exposed on UP builds when it needed to be.
Relocate the stub to the #else /* ! CONFIG_SMP */ section
and also annotate the relevant else/endif so that nobody
else falls into the same trap I did.
Reported-by: Michael Guntsche <mike@it-loops.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Benjamin Herrenschmidt [Mon, 18 Apr 2011 02:09:37 +0000 (12:09 +1000)]
Merge remote branch 'kumar/merge' into merge
Linus Torvalds [Mon, 18 Apr 2011 00:37:02 +0000 (17:37 -0700)]
Merge branch 'i2c-for-linus' of git://git./linux/kernel/git/jdelvare/staging
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
i2c-algo-bit: Call pre/post_xfer for bit_test
i2c: Improve deprecation warnings
Linus Torvalds [Mon, 18 Apr 2011 00:36:45 +0000 (17:36 -0700)]
Merge branch 's5p-fixes-for-linus' of git://git./linux/kernel/git/kgene/linux-samsung
* 's5p-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: SAMSUNG: Fix warning 's3c_pm_show_resume_irqs' defined but not used
ARM: SAMSUNG: Fix build failure in PM CRC check code
ARM: S5P: Remove unused s3c_pm_check_resume_pin
Richard Henderson [Sun, 17 Apr 2011 20:05:26 +0000 (13:05 -0700)]
alpha: Fix uninitialized value in read_persistent_clock.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Richard Henderson [Sun, 17 Apr 2011 20:05:25 +0000 (13:05 -0700)]
alpha: Fix RTC interrupt setup.
Following commit
091738a266fc ("genirq: Remove real old transition
functions") we removed an automatic conversion of no_irq_chip to
dummy_irq_chip. This change needs to be propagated back into the alpha
backend.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Richard Henderson [Sun, 17 Apr 2011 20:05:24 +0000 (13:05 -0700)]
alpha: Remove set but unused variables.
This is a new warning in gcc 4.6. Several of these variables are
used within #if 0 code, which probably ought to be removed. Most
of the changes are legitimate cleanups.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Richard Henderson [Sun, 17 Apr 2011 20:05:23 +0000 (13:05 -0700)]
alpha: Don't force -Werror.
There are outstanding gcc 4.6 warnings that need to be cleaned up
in the subdirectory. No sense forcing the issue immediately.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Milton Miller [Thu, 14 Apr 2011 15:30:08 +0000 (10:30 -0500)]
fs: synchronize_rcu when unregister_filesystem success not failure
While checking unregister_filesystem for saftey vs extra calls for
"ext4: register ext2 and ext3 alias after ext4" I realized that
the synchronize_rcu() was called on the error path but not on
the success path.
Cc: stable (2.6.38)
Signed-off-by: Milton Miller <miltonm@bga.com>
[ This probably won't really make a difference since commit
d863b50ab013
("vfs: call rcu_barrier after ->kill_sb()"), but it's the right thing
to do. - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Alex Deucher [Sun, 17 Apr 2011 08:20:19 +0000 (10:20 +0200)]
i2c-algo-bit: Call pre/post_xfer for bit_test
Apparently some distros set i2c-algo-bit.bit_test to 1 by
default. In some cases this causes i2c_bit_add_bus
to fail and prevents the i2c bus from being added. In the
radeon case, we fail to add the ddc i2c buses which prevents
the driver from being able to detect attached monitors.
The i2c bus works fine even if bit_test fails. This is likely
due to gpio switching that is required and handled in the
pre/post_xfer hooks, so call the pre/post_xfer hooks in the
bit test as well.
Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=36221
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org [.38 down to .34]
Jean Delvare [Sun, 17 Apr 2011 08:20:19 +0000 (10:20 +0200)]
i2c: Improve deprecation warnings
When warning on the use of deprecated i2c_driver methods
attach_adapter and detach_adapter, mention the name of the driver
which needs to be updated.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Linus Torvalds [Sat, 16 Apr 2011 17:33:41 +0000 (10:33 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
block: make unplug timer trace event correspond to the schedule() unplug
block: let io_schedule() flush the plug inline
Linus Torvalds [Sat, 16 Apr 2011 17:33:13 +0000 (10:33 -0700)]
Merge branch 'usb-linus' of git://git./linux/kernel/git/gregkh/usb-2.6
* 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (43 commits)
Revert "USB: isp1760-hcd: move imask clear after pending work is done"
xHCI: Implement AMD PLL quirk
xhci: Tell USB core both roothubs lost power.
usbcore: Bug fix: system can't suspend with USB3.0 device connected to USB3.0 hub
USB: Fix unplug of device with active streams
USB: xhci - also free streams when resetting devices
xhci: Fix NULL pointer deref in handle_port_status()
USB: xhci - fix math in xhci_get_endpoint_interval()
USB: xhci: simplify logic of skipping missed isoc TDs
USB: xhci - remove excessive 'inline' markings
USB: xhci: unsigned char never equals -1
USB: xhci - fix unsafe macro definitions
USB: fix formatting of SuperSpeed endpoints in /proc/bus/usb/devices
USB: isp1760-hcd: move imask clear after pending work is done
USB: fsl_qe_udc: send ZLP when zero flag and length % maxpacket == 0
usb: qcserial add missing errorpath kfrees
usb: qcserial avoid pointing to freed memory
usb: Fix qcserial memory leak on rmmod
USB: ftdi_sio: add ids for Hameg HO720 and HO730
USB: option: Added support for Samsung GT-B3730/GT-B3710 LTE USB modem.
...
Linus Torvalds [Sat, 16 Apr 2011 16:45:08 +0000 (09:45 -0700)]
Merge branches 'core-fixes-for-linus', 'perf-fixes-for-linus', 'sched-fixes-for-linus', 'timer-fixes-for-linus' and 'x86-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
futex: Set FLAGS_HAS_TIMEOUT during futex_wait restart setup
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf_event: Fix cgrp event scheduling bug in perf_enable_on_exec()
perf: Fix a build error with some GCC versions
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched: Fix erroneous all_pinned logic
sched: Fix sched-domain avg_load calculation
* 'timer-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
RTC: rtc-mrst: follow on to the change of rtc_device_register()
RTC: add missing "return 0" in new alarm func for rtc-bfin.c
RTC: Fix s3c compile error due to missing s3c_rtc_setpie
RTC: Fix early irqs caused by calling rtc_set_alarm too early
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, amd: Disable GartTlbWlkErr when BIOS forgets it
x86, NUMA: Fix fakenuma boot failure
x86/mrst: Fix boot crash caused by incorrect pin to irq mapping
x86/ce4100: Add reg property to bridges
Jens Axboe [Sat, 16 Apr 2011 11:51:05 +0000 (13:51 +0200)]
block: make unplug timer trace event correspond to the schedule() unplug
It's a pretty close match to what we had before - the timer triggering
would mean that nobody unplugged the plug in due time, in the new
scheme this matches very closely what the schedule() unplug now is.
It's essentially the difference between an explicit unplug (IO unplug)
or an implicit unplug (timer unplug, we scheduled with pending IO
queued).
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Jens Axboe [Sat, 16 Apr 2011 11:27:55 +0000 (13:27 +0200)]
block: let io_schedule() flush the plug inline
Linus correctly observes that the most important dispatch cases
are now done from kblockd, this isn't ideal for latency reasons.
The original reason for switching dispatches out-of-line was to
avoid too deep a stack, so by _only_ letting the "accidental"
flush directly in schedule() be guarded by offload to kblockd,
we should be able to get the best of both worlds.
So add a blk_schedule_flush_plug() that offloads to kblockd,
and only use that from the schedule() path.
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Josef Bacik [Tue, 12 Apr 2011 00:20:11 +0000 (20:20 -0400)]
Btrfs: avoid taking the chunk_mutex in do_chunk_alloc
Everytime we try to allocate disk space we try and see if we can pre-emptively
allocate a chunk, but in the common case we don't allocate anything, so there is
no sense in taking the chunk_mutex at all. So instead if we are allocating a
chunk, mark it in the space_info so we don't get two people trying to allocate
at the same time. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Reviewed-by: Liu Bo <liubo2009@cn.fujitsu.com>
Chris Mason [Sat, 16 Apr 2011 10:55:39 +0000 (06:55 -0400)]
Btrfs end_bio_extent_readpage should look for locked bits
A recent commit caches the extent state in end_bio_extent_readpage,
but the search it does should look for locked extents. This
fixes things to make it more effective.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Linus Torvalds [Sat, 16 Apr 2011 03:31:15 +0000 (20:31 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ericvh/v9fs
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
net/9p: nwname should be an unsigned int
9p: Fix sparse error
fs/9p: Fix error reported by coccicheck
9p: revert tsyncfs related changes
fs/9p: Use write_inode for data sync on server
fs/9p: Fix revalidate to return correct value
Linus Torvalds [Sat, 16 Apr 2011 03:19:17 +0000 (20:19 -0700)]
Merge branch 'for-linus' of git://android.git./kernel/tegra
* 'for-linus' of git://android.git.kernel.org/kernel/tegra:
arm: tegra: fix error check in tegra2_clocks.c
ARM: tegra: gpio: Fix unused variable warnings
Linus Torvalds [Sat, 16 Apr 2011 03:18:59 +0000 (20:18 -0700)]
Merge branch 'fixes' of /home/rmk/linux-2.6-arm
* 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm:
ARM: 6879/1: fix personality test wrt usage of domain handlers
ARM: 6878/1: fix personality flag propagation across an exec
ARM: 6877/1: the ADDR_NO_RANDOMIZE personality flag should be honored with mmap()
ARM: 6876/1: Kconfig.debug: Remove unused CONFIG_DEBUG_ERRORS
ARM: pxa: convert incorrect IRQ_TO_IRQ() to irq_to_gpio()
ARM: mmp: align NR_BUILTIN_GPIO with gpio interrupt number
ARM: pxa: align NR_BUILTIN_GPIO with GPIO interrupt number
ARM: pxa: always clear LPM bits for PXA168 MFPR
pcmcia: limit pxa2xx_trizeps4 subdriver to trizeps4 platform
pcmcia: limit pxa2xx_balloon3 subdriver to balloon3 platform
ARM: pxafb: Fix access to nonexistent member of pxafb_info
ARM: 6872/1: arch:common:Makefile Remove unused config in the Makefile.
ARM: 6868/1: Preserve the VFP state during fork
ARM: 6867/1: Introduce THREAD_NOTIFY_COPY for copy_thread() hooks
ARM: 6866/1: Do not restrict HIGHPTE to !OUTER_CACHE
ARM: 6865/1: perf: ensure pass through zero is counted on overflow
ARM: 6864/1: hw_breakpoint: clear DBGVCR out of reset
ARM: Only allow PM_SLEEP with CPUs which support suspend
ARM: Make consolidated PM sleep code depend on PM_SLEEP
Joerg Roedel [Fri, 15 Apr 2011 12:47:40 +0000 (14:47 +0200)]
x86, amd: Disable GartTlbWlkErr when BIOS forgets it
This patch disables GartTlbWlk errors on AMD Fam10h CPUs if
the BIOS forgets to do is (or is just too old). Letting
these errors enabled can cause a sync-flood on the CPU
causing a reboot.
The AMD BKDG recommends disabling GART TLB Wlk Error completely.
This patch is the fix for
https://bugzilla.kernel.org/show_bug.cgi?id=33012
on my machine.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Link: http://lkml.kernel.org/r/20110415131152.GJ18463@8bytes.org
Tested-by: Alexandre Demers <alexandre.f.demers@gmail.com>
Cc: <stable@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Tim Chen [Fri, 15 Apr 2011 18:39:29 +0000 (11:39 -0700)]
vfs: Fix absolute RCU path walk failures due to uninitialized seq number
During RCU walk in path_lookupat and path_openat, the rcu lookup
frequently failed if looking up an absolute path, because when root
directory was looked up, seq number was not properly set in nameidata.
We dropped out of RCU walk in nameidata_drop_rcu due to mismatch in
directory entry's seq number. We reverted to slow path walk that need
to take references.
With the following patch, I saw a 50% increase in an exim mail server
benchmark throughput on a 4-socket Nehalem-EX system.
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: stable@kernel.org (v2.6.38)
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Harsh Prateek Bora [Thu, 31 Mar 2011 10:19:39 +0000 (15:49 +0530)]
net/9p: nwname should be an unsigned int
Signed-off-by: Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric VAn Hensbergen <ericvh@gmail.com>
Aneesh Kumar K.V [Thu, 24 Mar 2011 17:44:46 +0000 (23:14 +0530)]
9p: Fix sparse error
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Aneesh Kumar K.V [Thu, 24 Mar 2011 17:34:41 +0000 (23:04 +0530)]
fs/9p: Fix error reported by coccicheck
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Aneesh Kumar K.V [Thu, 24 Mar 2011 15:08:35 +0000 (20:38 +0530)]
9p: revert tsyncfs related changes
Now that we use write_inode to flush server
cache related to fid, we don't need tsyncfs either fort dotl or dotu
protocols. For dotu this helps to do a more efficient server flush.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Aneesh Kumar K.V [Wed, 23 Mar 2011 09:41:27 +0000 (15:11 +0530)]
fs/9p: Use write_inode for data sync on server
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Aneesh Kumar K.V [Wed, 23 Mar 2011 14:18:16 +0000 (19:48 +0530)]
fs/9p: Fix revalidate to return correct value
revalidate should return > 0 on success. Also return 0 on ENOENT
to force do_revalidate to return NULL dentry;
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Chris Mason [Fri, 15 Apr 2011 20:05:44 +0000 (16:05 -0400)]
Btrfs: don't force chunk allocation in find_free_extent
find_free_extent likes to allocate in contiguous clusters,
which makes writeback faster, especially on SSD storage. As
the FS fragments, these clusters become harder to find and we have
to decide between allocating a new chunk to make more clusters
or giving up on the cluster to allocate from the free space
we have.
Right now it creates too many chunks, and you can end up with
a whole FS that is mostly empty metadata chunks. This commit
changes the allocation code to be more strict and only
allocate new chunks when we've made good use of the chunks we
already have.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
KOSAKI Motohiro [Fri, 15 Apr 2011 11:39:01 +0000 (20:39 +0900)]
x86, NUMA: Fix fakenuma boot failure
Currently, numa=fake boot parameter is broken. If it's used,
kernel may panic due to devide by zero error depending on CPU
configuration
Call Trace:
[<
ffffffff8104ad4c>] find_busiest_group+0x38c/0xd30
[<
ffffffff81086aff>] ? local_clock+0x6f/0x80
[<
ffffffff81050533>] load_balance+0xa3/0x600
[<
ffffffff81050f53>] idle_balance+0xf3/0x180
[<
ffffffff81550092>] schedule+0x722/0x7d0
[<
ffffffff81550538>] ? wait_for_common+0x128/0x190
[<
ffffffff81550a65>] schedule_timeout+0x265/0x320
[<
ffffffff81095815>] ? lock_release_holdtime+0x35/0x1a0
[<
ffffffff81550538>] ? wait_for_common+0x128/0x190
[<
ffffffff8109bb6c>] ? __lock_release+0x9c/0x1d0
[<
ffffffff815534e0>] ? _raw_spin_unlock_irq+0x30/0x40
[<
ffffffff815534e0>] ? _raw_spin_unlock_irq+0x30/0x40
[<
ffffffff81550540>] wait_for_common+0x130/0x190
[<
ffffffff81051920>] ? try_to_wake_up+0x510/0x510
[<
ffffffff8155067d>] wait_for_completion+0x1d/0x20
[<
ffffffff8107f36c>] kthread_create_on_node+0xac/0x150
[<
ffffffff81077bb0>] ? process_scheduled_works+0x40/0x40
[<
ffffffff8155045f>] ? wait_for_common+0x4f/0x190
[<
ffffffff8107a283>] __alloc_workqueue_key+0x1a3/0x590
[<
ffffffff81e0cce2>] cpuset_init_smp+0x6b/0x7b
[<
ffffffff81df3d07>] kernel_init+0xc3/0x182
[<
ffffffff8155d5e4>] kernel_thread_helper+0x4/0x10
[<
ffffffff81553cd4>] ? retint_restore_args+0x13/0x13
[<
ffffffff81df3c44>] ? start_kernel+0x400/0x400
[<
ffffffff8155d5e0>] ? gs_change+0x13/0x13
The divede by zero is caused by the following line,
group->cpu_power==0:
kernel/sched_fair.c::update_sg_lb_stats()
/* Adjust by relative CPU power of the group */
sgs->avg_load = (sgs->group_load * SCHED_LOAD_SCALE) / group->cpu_power;
This regression was caused by commit
e23bba6044 ("x86-64, NUMA: Unify
emulated distance mapping") because it changes cpu -> node
mapping in the process of dropping fake_physnodes().
old) all cpus are assinged node 0
now) cpus are assigned round robin
(the logic is implemented by numa_init_array())
Note: The change in behavior only happens if the system doesn't
have neither ACPI SRAT table nor AMD northbridge NUMA
information.
Round robin assignment doesn't work because init_numa_sched_groups_power()
assumes all logical cpus in the same physical cpu share the same node
(then it only accounts for group_first_cpu()), and the simple round robin
breaks the above assumption.
Thus, this patch implements a reassignment of node-ids if buggy firmware
or numa emulation makes wrong cpu node map. Tt enforce all logical cpus
in the same physical cpu share the same node.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/r/20110415203928.1303.A69D9226@jp.fujitsu.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Linus Torvalds [Fri, 15 Apr 2011 15:01:13 +0000 (08:01 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
block: only force kblockd unplugging from the schedule() path
block: cleanup the block plug helper functions
block, blk-sysfs: Use the variable directly instead of a function call
block: move queue run on unplug to kblockd
block: kill queue_sync_plugs()
block: readd plug trace event
block: add callback function for unplug notification
block: add comment on why we save and disable interrupts in flush_plug_list()
block: fixup block IO unplug trace call
block: remove block_unplug_timer() trace point
block: splice plug list to local context
Linus Torvalds [Fri, 15 Apr 2011 14:44:22 +0000 (07:44 -0700)]
Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6
* 'linux-next' of git://git.infradead.org/ubifs-2.6:
UBIFS: fix compilation warnings when compiling with gcc 4.5
UBIFS: fix oops when R/O file-system is fsync'ed
Darren Hart [Thu, 14 Apr 2011 22:41:57 +0000 (15:41 -0700)]
futex: Set FLAGS_HAS_TIMEOUT during futex_wait restart setup
The FLAGS_HAS_TIMEOUT flag was not getting set, causing the restart_block to
restart futex_wait() without a timeout after a signal.
Commit
b41277dc7a18ee332d in 2.6.38 introduced the regression by accidentally
removing the the FLAGS_HAS_TIMEOUT assignment from futex_wait() during the setup
of the restart block. Restore the originaly behavior.
Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=32922
Reported-by: Tim Smith <tsmith201104@yahoo.com>
Reported-by: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: John Kacur <jkacur@redhat.com>
Cc: stable@kernel.org
Link: http://lkml.kernel.org/r/%3Cdaac0eb3af607f72b9a4d3126b2ba8fb5ed3b883.1302820917.git.dvhart%40linux.intel.com%3E
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Linus Torvalds [Fri, 15 Apr 2011 14:34:26 +0000 (07:34 -0700)]
vfs: fix incorrect dentry_update_name_case() BUG_ON() test
The case we should be verifying when updating the dentry name is that
the _parent_ inode (the directory) semaphore is held, not the semaphore
for the dentry itself. It's the directory locking that rename and
readdir() etc all care about.
The comment just above even says so - but then the BUG_ON() still
checked the dentry inode itself.
Very few people noticed, because this helper function really isn't used
for very much, so you had to be using ncpfs to ever hit it.
I think I should just remove the BUG_ON (the function really has just
one user), but let's run with it fixed for a while before getting rid of
it entirely.
Reported-and-tested-by: Bongani Hlope <bonganih@bankservafrica.com>
Reported-and-tested-by: Bernd Feige <bernd.feige@uniklinik-freiburg.de>
Cc: Petr Vandrovec <petr@vandrovec.name>,
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jens Axboe [Fri, 15 Apr 2011 13:49:07 +0000 (15:49 +0200)]
block: only force kblockd unplugging from the schedule() path
For the explicit unplugging, we'd prefer to kick things off
immediately and not pay the penalty of the latency to switch
to kblockd. So let blk_finish_plug() do the run inline, while
the implicit-on-schedule-out unplug will punt to kblockd.
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Christoph Hellwig [Fri, 15 Apr 2011 13:20:10 +0000 (15:20 +0200)]
block: cleanup the block plug helper functions
It's a bit of a mess currently. task->plug is being cleared
and reset in __blk_finish_plug(), and blk_finish_plug() is
testing for a NULL plug which cannot happen even from schedule()
anymore since it uses blk_needs_flush_plug() to determine
whether to call into this function at all.
So get rid of some of the cruft.
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Linus Torvalds [Fri, 15 Apr 2011 02:03:27 +0000 (19:03 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/vapier/blackfin
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin:
Blackfin: SMP: fix cache flush loop
Blackfin: time-ts: ack gptimer sooner to avoid missing short ints
Blackfin: gptimers: fix thinko when disabling timers
Blackfin: SMP: make all barriers handle cache issues
Linus Torvalds [Fri, 15 Apr 2011 02:02:55 +0000 (19:02 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
libceph: fix linger request requeueing
Ben Hutchings [Thu, 14 Apr 2011 22:22:21 +0000 (15:22 -0700)]
mm/thp: use conventional format for boolean attributes
The conventional format for boolean attributes in sysfs is numeric ("0" or
"1" followed by new-line). Any boolean attribute can then be read and
written using a generic function. Using the strings "yes [no]", "[yes]
no" (read), "yes" and "no" (write) will frustrate this.
[akpm@linux-foundation.org: use kstrtoul()]
[akpm@linux-foundation.org: test_bit() doesn't return 1/0, per Neil]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Tested-by: David Rientjes <rientjes@google.com>
Cc: NeilBrown <neilb@suse.de>
Cc: <stable@kernel.org> [2.6.38.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Bob Liu [Thu, 14 Apr 2011 22:22:20 +0000 (15:22 -0700)]
ramfs: fix memleak on no-mmu arch
On no-mmu arch, there is a memleak during shmem test. The cause of this
memleak is ramfs_nommu_expand_for_mapping() added page refcount to 2
which makes iput() can't free that pages.
The simple test file is like this:
int main(void)
{
int i;
key_t k = ftok("/etc", 42);
for ( i=0; i<100; ++i) {
int id = shmget(k, 10000, 0644|IPC_CREAT);
if (id == -1) {
printf("shmget error\n");
}
if(shmctl(id, IPC_RMID, NULL ) == -1) {
printf("shm rm error\n");
return -1;
}
}
printf("run ok...\n");
return 0;
}
And the result:
root:/> free
total used free shared buffers
Mem: 60320 17912 42408 0 0
-/+ buffers: 17912 42408
root:/> shmem
run ok...
root:/> free
total used free shared buffers
Mem: 60320 19096 41224 0 0
-/+ buffers: 19096 41224
root:/> shmem
run ok...
root:/> free
total used free shared buffers
Mem: 60320 20296 40024 0 0
-/+ buffers: 20296 40024
...
After this patch the test result is:(no memleak anymore)
root:/> free
total used free shared buffers
Mem: 60320 16668 43652 0 0
-/+ buffers: 16668 43652
root:/> shmem
run ok...
root:/> free
total used free shared buffers
Mem: 60320 16668 43652 0 0
-/+ buffers: 16668 43652
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Richard Weinberger [Thu, 14 Apr 2011 22:22:18 +0000 (15:22 -0700)]
um: disable CONFIG_CMPXCHG_LOCAL
Commit
8a5ec0ba "Lockless (and preemptless) fastpaths for slub" makes use
of this_cpu_cmpxchg_double() which needs this_cpu_cmpxchg16b_emu() on
x86_64. Implementing cmpxchg16b emulation for UML would introduce too
much complexity. So just disable it.
Signed-off-by: Richard Weinberger <richard@nod.at>
Reported-by: Sergei Trofimovich <slyich@gmail.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Richard Weinberger [Thu, 14 Apr 2011 22:22:17 +0000 (15:22 -0700)]
um: fix call tracer and bug handler
Commit
1de1502c ("x86, um: now we can get rid of trivial uml headers")
removed accidentally bug.h which broke UML's call tracer and bug
handler.
Without asm-generic/bug.h UML uses BUG() from arch/x86/ which makes use
of ud2. UML cannot use ud2, it raises SIGILL in user mode. As UML has
a different stack for handling signals the call trace will be cut off.
Signed-off-by: Richard Weinberger <richard@nod.at>
Reported-by: Sergei Trofimovich <slyich@gmail.com>
Tested-by: Sergei Trofimovich <slyich@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jeff Mahoney [Thu, 14 Apr 2011 22:22:16 +0000 (15:22 -0700)]
fs/fhandle.c: add <linux/personality.h> for ia64
force_o_largefile() on ia64 is defined in <asm/fcntl.h> and requires
<linux/personality.h>.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Hans J. Koch [Thu, 14 Apr 2011 22:22:16 +0000 (15:22 -0700)]
MAINTAINERS: change mail adress of Hans J. Koch
My old mail address doesn't exist anymore. This patch changes all
occurences in MAINTAINERS to my new address.
Signed-off-by: Hans J. Koch <hjk@hansjkoch.de>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
projects / firefly-linux-kernel-4.4.55.git / log