firefly-linux-kernel-4.4.55.git
15 years agodavinci: DM646x: pass correct MUSB IRQs
Sergei Shtylyov [Thu, 16 Jul 2009 15:58:53 +0000 (19:58 +0400)]
davinci: DM646x: pass correct MUSB IRQs

DM646x has MUSB connected to IRQs 13 and 14 (unlike IRQ12 on other platforms),
so pass the correct IRQ resources with the platform device.

Signed-off-by: Dmitry Krivoschekov <dkrivoschekov@ru.mvista.com>
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: Rearrange the da830/omap-l137 macros and functions
Sudhakar Rajashekhara [Thu, 16 Jul 2009 09:45:32 +0000 (05:45 -0400)]
davinci: Rearrange the da830/omap-l137 macros and functions

Rearrange the PINMUX macros and pinmux_setup function which
are common between da830/omap-l137 and da850/omap-l138.

Also, replace the da830 string in function names to da8xx.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: Pass proper EDMA CC interrupt number for DA830/OMAP-L137
Sudhakar Rajashekhara [Fri, 10 Jul 2009 10:28:52 +0000 (06:28 -0400)]
davinci: Pass proper EDMA CC interrupt number for DA830/OMAP-L137

In EDMA resource structure, instead of passing EDMA CC
interrupt, EDMA TC error interrupt number is being passed.

Before the patch:
root@arago:~# cat /proc/interrupts
           CPU0
 12:          0     cp_intc  edma_error
 13:          0     cp_intc  edma
Err:

After the patch:
root@arago:~# cat /proc/interrupts
           CPU0
 11:          0     cp_intc  edma
 12:          0     cp_intc  edma_error
Err:

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: Move the da830/omap-l137 #defines to header file
Rajashekhara, Sudhakar [Fri, 10 Jul 2009 06:08:31 +0000 (02:08 -0400)]
davinci: Move the da830/omap-l137 #defines to header file

With the introduction of TI da850/omap-l138, some of the macros
defined for da830/omap-l137 will be needed in da850 source file.
So, move the common macros to da8xx.h header file.

Also, modify the macro names from DA830_... to DA8XX_.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: dm646x: Add IDE setup
Hemant Pedanekar [Thu, 9 Jul 2009 14:13:20 +0000 (19:43 +0530)]
davinci: dm646x: Add IDE setup

This patch adds platform data and init function for IDE which could be called
from board specific file to register IDE device.

Note that for 594MHz device the transfer mode is limited to UDMA4 since ideclk
rate is less than 100 MHz, which forces udma_mask in palm_bk3710.c to UDMA4,
while for 729MHz device, it is UDMA5.

Signed-off-by: Hemant Pedanekar <hemantp@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: make arch_idle and arch_reset as inline functions
Sekhar Nori [Thu, 9 Jul 2009 14:56:38 +0000 (20:26 +0530)]
davinci: make arch_idle and arch_reset as inline functions

Make arch_idle and arch_reset inline as inline function.

Not having them inline leads to a warning of this sort when only
one of these functions is used:

arch/arm/mach-davinci/include/mach/system.h:24: warning: 'arch_reset' \
defined but not used

boot, re-boot tested on OMAP-L138 EVM

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: da830: updates for mach-type name change
Kevin Hilman [Wed, 8 Jul 2009 15:32:27 +0000 (08:32 -0700)]
davinci: da830: updates for mach-type name change

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: Move IO device mapping macros from io.h to hardware.h
Hemant Pedanekar [Wed, 24 Jun 2009 04:45:47 +0000 (10:15 +0530)]
davinci: Move IO device mapping macros from io.h to hardware.h

This patch takes out IO mapping macros from mach/io.h and puts them in
mach/hardware.h avoiding need to include mach/io.h in various files such as
serial.h, vmalloc.h etc.

The main reason to avoid inclusion of mach/io.h is, when default in/out macros
are overridden by machine specific functions (e.g., in case of PCI I/O), they
result into linker error. An example snippet and error snapshot is listed below.

Following code in mach/io.h:

#define inl(p)  my_inl()

static inline unsigned int my_inl(unsigned int addr)
{
if (IS_PCI_IO(addr))
return pci_inl ();
else
return le32_to_cpu(__raw_readl(__typesafe_io(addr)));
}

leads to error:
LD      arch/arm/boot/compressed/vmlinux
arch/arm/boot/compressed/misc.o: In function `my_inl':
misc.c:(.text+0x2744): undefined reference to `pci_inl'
make[2]: *** [arch/arm/boot/compressed/vmlinux] Error 1

This is because mach/io.h gets included in arch/arm/boot/compressed/misc.c
through mach/serial.h but pci.c file, which defines 'pci_inl' doesn't get built
into compressed vmlinux.

Signed-off-by: Hemant Pedanekar <hemantp@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: dm646x: Add clock info and update mux setup for ATA
Hemant Pedanekar [Tue, 7 Jul 2009 14:19:41 +0000 (19:49 +0530)]
davinci: dm646x: Add clock info and update mux setup for ATA

This patch adds clock data for IDE and also updates pin mux mask for ATA so as
to disable PCI when ATA is selected.

Signed-off-by: Hemant Pedanekar <hemantp@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: Kconfig: update default config for 2.6.31-rc
Kevin Hilman [Mon, 6 Jul 2009 21:39:25 +0000 (14:39 -0700)]
davinci: Kconfig: update default config for 2.6.31-rc

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: ASoC: Add the platform devices for ASP
Chaithrika U S [Fri, 5 Jun 2009 10:28:08 +0000 (06:28 -0400)]
davinci: ASoC: Add the platform devices for ASP

1) Registers the platform devices for ASP on dm355, dm644x and dm646x
   so that the machine driver can probe to get ASP related platform
   data.
2) Move towards definition of the asp clocks using physical name(for
   dm355 and dm644x)
3) Add platform data to board specific files.

Signed-off-by: Naresh Medisetty <naresh@ti.com>
Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: dm365 gpio irq support
David Brownell [Fri, 26 Jun 2009 00:01:31 +0000 (17:01 -0700)]
davinci: dm365 gpio irq support

Support DM365 GPIOs ... primarily by handling non-banked GPIO IRQs:

 - Flag DM365 chips as using non-banked GPIO interrupts, using a
   new soc_info field.

 - Replace the gpio_to_irq() mapping logic.  This now uses some
   runtime infrastructure, keyed off that new soc_info field,
   which doesn't handle irq_to_gpio().

 - Provide a new irq_chip ... GPIO IRQs handled directly by AINTC
   still need edge triggering managed by the GPIO controller.

DM365 chips no longer falsely report 104 GPIO IRQs as they boot.

Intelligence about IRQ muxing is missing, so for the moment this
only exposes the first eight DM365 GPIOs, which are never muxed.
The next eight are muxed, half with Ethernet (which uses most of
those pins anyway).

Tested on DM355 (10 unbanked IRQs _or_ 104 banked ones) and also
on DM365 (16 unbanked ones, only 8 made available).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: DM365 Updating PINMUX Entries
Sandeep Paulraj [Wed, 24 Jun 2009 16:22:28 +0000 (12:22 -0400)]
davinci: DM365 Updating PINMUX Entries

Patch updates DM365 PINMUX by adding entries for Video, SPI 1 - 4,
PWM 0 - 3.

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: da8xx: Add support for DA830/OMAP-L137 EVM board
Mark A. Greer [Thu, 4 Jun 2009 01:41:53 +0000 (18:41 -0700)]
davinci: da8xx: Add support for DA830/OMAP-L137 EVM board

Add support for the DA830/OMAP-L137 Evaluation Module (EVM)
from TI.  The EVM has User Interface (UI) and Audio cards
that can be connected which contain various devices.
Support for those devices and ones on the EVM will be
added in subsequent patches.

Additional generalizations for future SoCs in da8xx family done by
Sudhakar Rajashekhara and Sekhar Nori.

Signed-off-by: Steve Chen <schen@mvista.com>
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Cc: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: da8xx: Add base DA830/OMAP-L137 SoC support
Mark A. Greer [Thu, 4 Jun 2009 01:36:54 +0000 (18:36 -0700)]
davinci: da8xx: Add base DA830/OMAP-L137 SoC support

The da830/omap l137 is a new SoC from TI that is similar
to the davinci line.  Since its so similar to davinci,
put the support for the da830 in the same directory as
the davinci code.

There are differences, however.  Some of those differences
prevent support for davinci and da830 platforms to work
in the same kernel binary.  Those differences are:

1) Different physical address for RAM.  This is relevant
   to Makefile.boot addresses and PHYS_OFFSET.  The
   Makefile.boot issue isn't truly a kernel issue but
   it means u-boot won't work with a uImage including
   both architectures.  The PHYS_OFFSET issue is
   addressed by the "Allow for runtime-determined
   PHYS_OFFSET" patch by Lennert Buytenhek but it
   hasn't been accepted yet.

2) Different uart addresses.  This is only an issue
   for the 'addruart' assembly macro when CONFIG_DEBUG_LL
   is enabled.  Since the code in that macro is called
   so early (e.g., by _error_p in kernel/head.S when
   the processor lookup fails), we can't determine what
   platform the kernel is running on at runtime to use
   the correct uart address.

These areas have compile errors intentionally inserted
to indicate to the builder they're doing something wrong.

A new config variable, CONFIG_ARCH_DAVINCI_DMx, is added
to distinguish between a true davinci architecture and
the da830 architecture.

Note that the da830 currently has an issue with writeback
data cache so CONFIG_CPU_DCACHE_WRITETHROUGH should be
enabled when building a da830 kernel.

Additional generalizations for future SoCs in the da8xx family done by
Sudhakar Rajashekhara and Sekhar Nori.

Signed-off-by: Steve Chen <schen@mvista.com>
Signed-off-by: Mikhail Cherkashin <mcherkashin@ru.mvista.com>
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Cc: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: dm365 evm cpld support: leds, card detect, other setup
David Brownell [Sun, 21 Jun 2009 21:50:12 +0000 (14:50 -0700)]
davinci: dm365 evm cpld support: leds, card detect, other setup

Add basic support for the CPLD on the DM365 EVM board:

 - Read SW5 to set up NAND and keypad vs (someday) OneNAND
 - Export MMC/SD card detect and writeprotect signals
 - LED support (same layout as on DM355 EVM)
 - Static config for video input:
     * external HD imager precludes MMC1, Ethernet, audio
     * else either tvp5146 (SD/default) or tvp7002 (HD)

The video input could actually be switched around dynamically;
change that if/when that's needed (and after those other video
inputs have driver support).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: dm365: add NAND support to EVM board
Sandeep Paulraj [Sat, 20 Jun 2009 18:15:51 +0000 (14:15 -0400)]
davinci: dm365: add NAND support to EVM board

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: MMC/SD Support for dm365 EVM
Sandeep Paulraj [Sat, 20 Jun 2009 18:00:52 +0000 (14:00 -0400)]
davinci: MMC/SD Support for dm365 EVM

Patch adds support for MMC/SD in the DM365 EVM.
Pinmux for MMC/SD slot 1 on the DM365 EVM is also
configured.

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: dm365: add MMC/SD support
Sandeep Paulraj [Sat, 20 Jun 2009 17:58:32 +0000 (13:58 -0400)]
davinci: dm365: add MMC/SD support

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: dm365: add EDMA support
Sandeep Paulraj [Sat, 20 Jun 2009 17:15:39 +0000 (13:15 -0400)]
davinci: dm365: add EDMA support

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: dm365: EMAC support for SoC and dm365 EVM
Sandeep Paulraj [Sat, 20 Jun 2009 16:23:39 +0000 (12:23 -0400)]
davinci: dm365: EMAC support for SoC and dm365 EVM

The patch adds Support for EMAC in the DM365 SOC and
the DM365 EVM board.

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: dm365: add mux entries for EDMA, RTC, EMAC, keypad.
Sandeep Paulraj [Sat, 20 Jun 2009 16:11:09 +0000 (12:11 -0400)]
davinci: dm365: add mux entries for EDMA, RTC, EMAC, keypad.

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: Adding DM365 entries to Makefile/Kconfig/defconfig
Sandeep Paulraj [Tue, 9 Jun 2009 20:28:44 +0000 (16:28 -0400)]
davinci: Adding DM365 entries to Makefile/Kconfig/defconfig

This patch does the following
1) Adds entries to davinci_all_defconfig for DM365
2) Adds entries to the Makefile for DM365
3) Adds entries for DM365 in the Kconfig

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: Adding DM365 EVM board support
Sandeep Paulraj [Tue, 9 Jun 2009 20:28:15 +0000 (16:28 -0400)]
davinci: Adding DM365 EVM board support

The patch adds support for Evaluation Module (EVM) board for the dm365
SoC.

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: Adding DM365 SOC Support
Sandeep Paulraj [Thu, 11 Jun 2009 13:41:05 +0000 (09:41 -0400)]
davinci: Adding DM365 SOC Support

The patch adds base support for new TI SOC DM365, which s
similar to the dm355.

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: remove watchdog from soc_info
Kevin Hilman [Wed, 3 Jun 2009 19:24:50 +0000 (12:24 -0700)]
davinci: remove watchdog from soc_info

watchdog info is not needed in soc_info, platform_device can
be used directly in core code.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: sram warning fix
David Brownell [Sat, 6 Jun 2009 04:45:14 +0000 (21:45 -0700)]
davinci: sram warning fix

CC      arch/arm/mach-davinci/sram.o
arch/arm/mach-davinci/sram.c: In function 'sram_init':
arch/arm/mach-davinci/sram.c:63: warning: comparison of distinct pointer types lacks a cast

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: Kconfig: enable EVMs by default when SoCs are enabled
Kevin Hilman [Wed, 3 Jun 2009 21:54:27 +0000 (14:54 -0700)]
davinci: Kconfig: enable EVMs by default when SoCs are enabled

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: dm644x: Support for dm644x silicon revision 2.1
Rajashekhara, Sudhakar [Tue, 2 Jun 2009 10:48:43 +0000 (06:48 -0400)]
davinci: dm644x: Support for dm644x silicon revision 2.1

JTAG ID for DM644x silicon revision 2.1 has changed. An entry for the new
silicon revision needs to be added to the davinci_id structure. Without
this addition, EVMs with new silicon revision fail to boot the kernel.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: Fix watchdog reset code
David Griego [Mon, 1 Jun 2009 18:41:54 +0000 (11:41 -0700)]
davinci: Fix watchdog reset code

The davinci reset routine, davinci_watchdog_reset(), sets the
TCR register instead of the TGCR register as it should to put
the WDT into its "Initial State".

It also writes the WDTCR register without the proper WDKEY
which is pointless since the register will be write-protected.

Signed-off-by: David Griego <dgriego@mvista.com>
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: dm646x: Adds McASP clock
Chaithrika U S [Thu, 28 May 2009 09:09:21 +0000 (05:09 -0400)]
davinci: dm646x: Adds McASP clock

Adds McASP clock support for the two instances of mcasp (mcasp0,mcasp1). This
patch is part of the audio support for dm646x series.

Signed-off-by: Naresh Medisetty <naresh@ti.com>
Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: EDMA: add support for dm646x
Sudhakar Rajashekhara [Tue, 2 Jun 2009 07:38:26 +0000 (03:38 -0400)]
davinci: EDMA: add support for dm646x

Enables module clock for DM646x EDMA channel controller and transfer
controller.

Signed-off-by: Naresh Medisetty <naresh@ti.com>
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agodavinci: EDMA: multiple CCs, channel mapping and API changes
Sudhakar Rajashekhara [Thu, 21 May 2009 11:41:35 +0000 (07:41 -0400)]
davinci: EDMA: multiple CCs, channel mapping and API changes

- restructure to support multiple channel controllers by using
  additional struct resources for each CC

- interface changes visible to EDMA clients

  Introduce macros to build IDs from controller and channel number,
  and to extract them. Modify the edma_alloc_slot function to take an
  extra argument for the controller.

  Also update ASoC drivers to use API.  ASoC changes
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
- Move queue related mappings to dm<soc>.c

  EDMA in DM355 and DM644x has two transfer controllers while DM646x
  has four transfer controllers. Moving the queue to tc mapping and
  queue priority mapping to dm<soc>.c will be helpful to probe these
  mappings from platform device so that the machine_is_* testing will
  be avoided.

- add channel mapping logic

  Channel mapping logic is introduced in dm646x EDMA. This implies
  that there is no fixed association for a channel number to a
  parameter entry number. In other words, using the DMA channel
  mapping registers (DCHMAPn), a PaRAM entry can be mapped to any
  channel. While in the case of dm644x and dm355 there is a fixed
  mapping between the EDMA channel and Param entry number.

Signed-off-by: Naresh Medisetty <naresh@ti.com>
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Reviewed-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agoMAINTAINERS: add entry for TI DaVinci machine support
Kevin Hilman [Fri, 19 Jun 2009 19:02:33 +0000 (12:02 -0700)]
MAINTAINERS: add entry for TI DaVinci machine support

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
15 years agoLinux 2.6.31-rc7
Linus Torvalds [Sat, 22 Aug 2009 01:00:46 +0000 (18:00 -0700)]
Linux 2.6.31-rc7

15 years agoRe-introduce page mapping check in mark_buffer_dirty()
Linus Torvalds [Sat, 22 Aug 2009 00:40:08 +0000 (17:40 -0700)]
Re-introduce page mapping check in mark_buffer_dirty()

In commit a8e7d49aa7be728c4ae241a75a2a124cdcabc0c5 ("Fix race in
create_empty_buffers() vs __set_page_dirty_buffers()"), I removed a test
for a NULL page mapping unintentionally when some of the code inside
__set_page_dirty() was moved to the callers.

That removal generally didn't matter, since a filesystem would serialize
truncation (which clears the page mapping) against writing (which marks
the buffer dirty), so locking at a higher level (either per-page or an
inode at a time) should mean that the buffer page would be stable.  And
indeed, nothing bad seemed to happen.

Except it turns out that apparently reiserfs does something odd when
under load and writing out the journal, and we have a number of bugzilla
entries that look similar:

http://bugzilla.kernel.org/show_bug.cgi?id=13556
http://bugzilla.kernel.org/show_bug.cgi?id=13756
http://bugzilla.kernel.org/show_bug.cgi?id=13876

and it looks like reiserfs depended on that check (the common theme
seems to be "data=journal", and a journal writeback during a truncate).

I suspect reiserfs should have some additional locking, but in the
meantime this should get us back to the pre-2.6.29 behavior.

Pattern-pointed-out-by: Roland Kletzing <devzero@web.de>
Cc: stable@kernel.org (2.6.29 and 2.6.30)
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoMerge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
Linus Torvalds [Fri, 21 Aug 2009 17:45:09 +0000 (10:45 -0700)]
Merge branch 'drm-fixes' of git://git./linux/kernel/git/airlied/drm-2.6

* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm/radeon: add GET_PARAM/INFO support for Z pipes
  drm/radeon/kms: add r100/r200 OQ support.
  drm: Fix sysfs device confusion.
  drm/radeon/kms: implement the bo busy ioctl properly.

15 years agoMerge branch 'btrfs' of git://git.kernel.dk/linux-2.6-block
Linus Torvalds [Fri, 21 Aug 2009 16:56:55 +0000 (09:56 -0700)]
Merge branch 'btrfs' of git://git.kernel.dk/linux-2.6-block

* 'btrfs' of git://git.kernel.dk/linux-2.6-block:
  btrfs: fix inode rbtree corruption

15 years agox86: don't call '->send_IPI_mask()' with an empty mask
Linus Torvalds [Fri, 21 Aug 2009 16:48:10 +0000 (09:48 -0700)]
x86: don't call '->send_IPI_mask()' with an empty mask

As noted in 83d349f35e1ae72268c5104dbf9ab2ae635425d4 ("x86: don't send
an IPI to the empty set of CPU's"), some APIC's will be very unhappy
with an empty destination mask.  That commit added a WARN_ON() for that
case, and avoided the resulting problem, but didn't fix the underlying
reason for why those empty mask cases happened.

This fixes that, by checking the result of 'cpumask_andnot()' of the
current CPU actually has any other CPU's left in the set of CPU's to be
sent a TLB flush, and not calling down to the IPI code if the mask is
empty.

The reason this started happening at all is that we started passing just
the CPU mask pointers around in commit 4595f9620 ("x86: change
flush_tlb_others to take a const struct cpumask"), and when we did that,
the cpumask was no longer thread-local.

Before that commit, flush_tlb_mm() used to create it's own copy of
'mm->cpu_vm_mask' and pass that copy down to the low-level flush
routines after having tested that it was not empty.  But after changing
it to just pass down the CPU mask pointer, the lower level TLB flush
routines would now get a pointer to that 'mm->cpu_vm_mask', and that
could still change - and become empty - after the test due to other
CPU's having flushed their own TLB's.

See

http://bugzilla.kernel.org/show_bug.cgi?id=13933

for details.

Tested-by: Thomas Björnell <thomas.bjornell@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoMake bitmask 'and' operators return a result code
Linus Torvalds [Fri, 21 Aug 2009 16:26:15 +0000 (09:26 -0700)]
Make bitmask 'and' operators return a result code

When 'and'ing two bitmasks (where 'andnot' is a variation on it), some
cases want to know whether the result is the empty set or not.  In
particular, the TLB IPI sending code wants to do cpumask operations and
determine if there are any CPU's left in the final set.

So this just makes the bitmask (and cpumask) functions return a boolean
for whether the result has any bits set.

Cc: stable@kernel.org (2.6.30, needed by TLB shootdown fix)
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agox86: don't send an IPI to the empty set of CPU's
Linus Torvalds [Fri, 21 Aug 2009 16:23:57 +0000 (09:23 -0700)]
x86: don't send an IPI to the empty set of CPU's

The default_send_IPI_mask_logical() function uses the "flat" APIC mode
to send an IPI to a set of CPU's at once, but if that set happens to be
empty, some older local APIC's will apparently be rather unhappy.  So
just warn if a caller gives us an empty mask, and ignore it.

This fixes a regression in 2.6.30.x, due to commit 4595f9620 ("x86:
change flush_tlb_others to take a const struct cpumask"), documented
here:

http://bugzilla.kernel.org/show_bug.cgi?id=13933

which causes a silent lock-up.  It only seems to happen on PPro, P2, P3
and Athlon XP cores.  Most developers sadly (or not so sadly, if you're
a developer..) have more modern CPU's.  Also, on x86-64 we don't use the
flat APIC mode, so it would never trigger there even if the APIC didn't
like sending an empty IPI mask.

Reported-by: Pavel Vilim <wylda@volny.cz>
Reported-and-tested-by: Thomas Björnell <thomas.bjornell@gmail.com>
Reported-and-tested-by: Martin Rogge <marogge@onlinehome.de>
Cc: Mike Travis <travis@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agodrm/radeon: add GET_PARAM/INFO support for Z pipes
Alex Deucher [Wed, 19 Aug 2009 23:11:39 +0000 (19:11 -0400)]
drm/radeon: add GET_PARAM/INFO support for Z pipes

Needed for occlusion queries on rv530 chips.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
15 years agobtrfs: fix inode rbtree corruption
From: Nick Piggin [Fri, 21 Aug 2009 08:09:44 +0000 (10:09 +0200)]
btrfs: fix inode rbtree corruption

Node may not be inserted over existing node. This causes inode tree
corruption and I was seeing crashes in inode_tree_del which I can not
reproduce after this patch.

The other way to fix this would be to tie inode lifetime in the rbtree
with inode while not in freeing state. I had a look at this but it is
not so trivial at this point. At least this patch gets things working again.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Chris Mason <chris.mason@oracle.com>
Acked-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agodrm/radeon/kms: add r100/r200 OQ support.
Dave Airlie [Fri, 21 Aug 2009 00:07:54 +0000 (10:07 +1000)]
drm/radeon/kms: add r100/r200 OQ support.

This adds the relocation necessary for OQ support on the r100/r200
chipsets.

Signed-off-by: Dave Airlie <airlied@redhat.com>
15 years agodrm: Fix sysfs device confusion.
Thomas Hellstrom [Thu, 20 Aug 2009 09:02:31 +0000 (19:02 +1000)]
drm: Fix sysfs device confusion.

The drm sysfs class suspend / resume methods could not distinguish
between different device types wich could lead to illegal type casts.

Use struct device_type and make sure the class suspend / resume callbacks
are aware of those. There is no per device-type suspend / resume. Only
new-style PM.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
15 years agodrm/radeon/kms: implement the bo busy ioctl properly.
Dave Airlie [Thu, 20 Aug 2009 23:47:45 +0000 (09:47 +1000)]
drm/radeon/kms: implement the bo busy ioctl properly.

The previous patch assumes the ioctl already existed, when
it actually didn't.

It also didn't return the correct error code.

Signed-off-by: Dave Airlie <airlied@redhat.com>
15 years agoMerge branch 'i2c-fixes-rc6' of git://aeryn.fluff.org.uk/bjdooks/linux
Linus Torvalds [Thu, 20 Aug 2009 21:55:24 +0000 (14:55 -0700)]
Merge branch 'i2c-fixes-rc6' of git://aeryn.fluff.org.uk/bjdooks/linux

* 'i2c-fixes-rc6' of git://aeryn.fluff.org.uk/bjdooks/linux:
  i2c-stu300: I2C STU300 stability updates
  i2c-omap: Enable workaround for Errata 1.153 based on
  i2c-omap: ACK pending [R/X]DR and [R/X]RDY interrupts
  i2c-omap: Fix I2C status ACK

15 years agoi2c-stu300: I2C STU300 stability updates
Linus Walleij [Thu, 13 Aug 2009 20:14:23 +0000 (22:14 +0200)]
i2c-stu300: I2C STU300 stability updates

- blk clk is enabled when an irq arrives. The clk should be enabled,
  but just to make sure.
- All error bits are handled no matter state machine state
- All irq's will run complete() except for irq's that wasn't an event.
- No more looking into status registers just in case an interrupt
  has happend and the irq handle wasn't executed.
- irq_disable/enable are now separete functions.
- clk settings calculation changed to round upwards instead of
  downwards.
- Number of address send attempts before giving up is increased to 12
  from 10 since it most times take 8 tries before getting through.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
15 years agoi2c-omap: Enable workaround for Errata 1.153 based on
Moiz Sonasath [Thu, 20 Aug 2009 16:21:16 +0000 (11:21 -0500)]
i2c-omap: Enable workaround for Errata 1.153 based on

Silicon Errata 1.153 has been fixed on OMAP 3630|4430 with the use of a later
version of I2C IP block.

The errata impacts OMAP 2420|2430|3430, enable the workaround for these based
on I2C IP block revision number instead of OMAP CPU type

Signed-off-by: Moiz Sonasath <m-sonasath@ti.com>
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
15 years agoi2c-omap: ACK pending [R/X]DR and [R/X]RDY interrupts
Moiz Sonasath [Thu, 20 Aug 2009 16:21:15 +0000 (11:21 -0500)]
i2c-omap: ACK pending [R/X]DR and [R/X]RDY interrupts

ACK any pending read/write interrupts before exiting the ISR either after
completing the operation [ARDY interrupt] or in case of an error
[NACK|AL interrupt]

Signed-off-by: Moiz Sonasath <m-sonasath@ti.com>
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
15 years agoi2c-omap: Fix I2C status ACK
Nishanth Menon [Thu, 20 Aug 2009 16:21:14 +0000 (11:21 -0500)]
i2c-omap: Fix I2C status ACK

I2C status ack for [RX]RDR and [RX]RDY could
cause race conditions of clearing the event
twice and a violation of the programing
sequence as defined in TRM This patch fixes
the same.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Moiz Sonasath <m-sonasath@ti.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
15 years agoMerge branch 'fix/hda' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
Linus Torvalds [Thu, 20 Aug 2009 17:19:39 +0000 (10:19 -0700)]
Merge branch 'fix/hda' of git://git./linux/kernel/git/tiwai/sound-2.6

* 'fix/hda' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ALSA: hda - Fix probe of Toshiba laptops with ALC268 codec
  ALSA: hda: add model for Intel DG45ID/DG45FC boards
  ALSA: hda: enable speaker output for Compaq 6530s/6531s

15 years agoALSA: hda - Fix probe of Toshiba laptops with ALC268 codec
Takashi Iwai [Wed, 19 Aug 2009 18:05:02 +0000 (20:05 +0200)]
ALSA: hda - Fix probe of Toshiba laptops with ALC268 codec

There are many variants of Toshiba laptops with ALC268 codec, and
it seems that a few of them don't work with model=toshiba preset
since they have the secondary ALC268 codec just for HDMI output.
This is a regression due to the previous clean-up work to merge all
Toshiba quirk entries into a single check.

This patch adds the identification of such laptops to apply the
standard BIOS-probing method.  Unfortunately, Toshiba laptops have
all the same PCI SSID, so we need to check the codec SSID to identify
each device.

Tested-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
15 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke...
Linus Torvalds [Wed, 19 Aug 2009 17:40:24 +0000 (10:40 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ryusuke/nilfs2

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2:
  nilfs2: fix oopses with doubly mounted snapshots
  nilfs2: missing a read lock for segment writer in nilfs_attach_checkpoint()

15 years agoAFS: Documentation updates
Anton Blanchard [Wed, 19 Aug 2009 15:10:16 +0000 (16:10 +0100)]
AFS: Documentation updates

Fix some issues with the AFS documentation, found when testing AFS on ppc64:

- Update AFS features: reading/writing, local caching
- Typo in kafs sysfs debug file
- Use modprobe instead of insmod in example
- Update IPs for grand.central.org

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoMerge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
Linus Torvalds [Wed, 19 Aug 2009 17:38:36 +0000 (10:38 -0700)]
Merge branch 'drm-fixes' of git://git./linux/kernel/git/airlied/drm-2.6

* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm/kms: teardown crtc correctly when fb is destroyed.
  drm/kms/radeon: cleanup combios TV table like DDX.
  drm/radeon/kms: memset the allocated framebuffer before using it.
  drm/radeon/kms: although LVDS might be possible on crtc 1 don't do it.
  drm/radeon/kms: implement bo busy check + current domain
  drm/radeon/kms: cut down indirects in register accesses.
  drm/radeon/kms: Fix up vertical blank interrupt support.
  drm/radeon/kms: add rv530 R300_SU_REG_DEST + reloc for ZPASS_ADDR
  drm/edid: fixup detailed timings like the X server.
  drm/radeon/kms: Add specific rs690 authorized register table

15 years agoMerge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze
Linus Torvalds [Wed, 19 Aug 2009 16:44:51 +0000 (09:44 -0700)]
Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze

* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Update Microblaze defconfigs
  microblaze: Use klimit instead of _end for memory init
  microblaze: Enable ppoll syscall
  microblaze: Sane handling of missing timer/intc in device tree
  microblaze: use the generic ack_bad_irq implementation

15 years agoMerge branch 'perfcounters-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux...
Linus Torvalds [Wed, 19 Aug 2009 16:43:19 +0000 (09:43 -0700)]
Merge branch 'perfcounters-fixes-for-linus-2' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'perfcounters-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf tools: Make 'make html' work
  perf annotate: Fix segmentation fault
  perf_counter: Fix the PARISC build
  perf_counter: Check task on counter read IPI
  perf: Rename perf-examples.txt to examples.txt
  perf record: Fix typo in pid_synthesize_comm_event

15 years agoALSA: hda: add model for Intel DG45ID/DG45FC boards
Wu Fengguang [Wed, 19 Aug 2009 09:05:11 +0000 (17:05 +0800)]
ALSA: hda: add model for Intel DG45ID/DG45FC boards

The BIOS pin configs are in fact correct and shall not be overwritten.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
15 years agoALSA: hda: enable speaker output for Compaq 6530s/6531s
Wu Fengguang [Wed, 19 Aug 2009 08:58:59 +0000 (16:58 +0800)]
ALSA: hda: enable speaker output for Compaq 6530s/6531s

HP Compaq 6530s and 6531s internal speaker is silence or becomes silence
within 1 minute after fresh boot. It is found that pin 0x1c must be set to
PIN_OUT mode to make the speaker work. This is weird - line-in pin 0x1c and
speaker pin 0x16 seem to be unrelated.

The codec differences before/after patch are:

@@ Node 0x17 [Pin Complex] wcaps 0x40020b:
   Pin Default 0x41a6e130: [N/A] Mic at Ext Rear
     Conn = Digital, Color = White
     DefAssociation = 0x3, Sequence = 0x0
     Misc = NO_PRESENCE
-  Pin-ctls: 0x24: IN
+  Pin-ctls: 0x40: OUT
@@ Node 0x1c [Pin Complex] wcaps 0x40018d:
   Pin Default 0x41813021: [N/A] Line In at Ext Rear
     Conn = 1/8, Color = Blue
     DefAssociation = 0x2, Sequence = 0x1
-  Pin-ctls: 0x24: IN VREF_80
+  Pin-ctls: 0x40: OUT VREF_HIZ
   Unsolicited: tag=00, enabled=0
   Connection: 1
      0x24

Tests show that it won't impact (external) Mic recording.

Reported-by: "Lin, Ming M" <ming.m.lin@intel.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
15 years agodrm/kms: teardown crtc correctly when fb is destroyed.
Dave Airlie [Mon, 17 Aug 2009 03:11:23 +0000 (13:11 +1000)]
drm/kms: teardown crtc correctly when fb is destroyed.

If userspace destroys a framebuffer that is in use on a crtc,
don't just null it out, tear down the crtc properly so the
hw gets turned off.

Signed-off-by: Dave Airlie <airlied@redhat.com>
15 years agodrm/kms/radeon: cleanup combios TV table like DDX.
Dave Airlie [Mon, 17 Aug 2009 00:19:51 +0000 (10:19 +1000)]
drm/kms/radeon: cleanup combios TV table like DDX.

The fallback case wasn't getting executed properly if there
was no TV table, which my T42 M7 hasn't got.

Signed-off-by: Dave Airlie <airlied@redhat.com>
15 years agodrm/radeon/kms: memset the allocated framebuffer before using it.
Dave Airlie [Mon, 17 Aug 2009 00:20:47 +0000 (10:20 +1000)]
drm/radeon/kms: memset the allocated framebuffer before using it.

This gets rid of some ugliness, we shuold probably find a way
for the GPU to zero this.

Signed-off-by: Dave Airlie <airlied@redhat.com>
15 years agodrm/radeon/kms: although LVDS might be possible on crtc 1 don't do it.
Dave Airlie [Mon, 17 Aug 2009 00:22:37 +0000 (10:22 +1000)]
drm/radeon/kms: although LVDS might be possible on crtc 1 don't do it.

LVDS always requests RMX_FULL, we need to fix it so that doesn't happen
before we can enable LVDS on crtc 1.

Signed-off-by: Dave Airlie <airlied@redhat.com>
15 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Wed, 19 Aug 2009 02:41:47 +0000 (19:41 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/security-testing-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
  security: Fix prompt for LSM_MMAP_MIN_ADDR
  security: Make LSM_MMAP_MIN_ADDR default match its help text.

15 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
Linus Torvalds [Wed, 19 Aug 2009 02:41:05 +0000 (19:41 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/tj/percpu

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
  percpu: use the right flag for get_vm_area()
  percpu, sparc64: fix sparse possible cpu map handling
  init: set nr_cpu_ids before setup_per_cpu_areas()

15 years agoMerge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Tue, 18 Aug 2009 23:55:43 +0000 (16:55 -0700)]
Merge branch 'x86-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, mce: Don't initialize MCEs on unknown CPUs
  x86, mce: don't log boot MCEs on Pentium M (model == 13) CPUs
  x86: Annotate section mismatch warnings in kernel/apic/x2apic_uv_x.c
  x86, mce: therm_throt: Don't log redundant normality
  x86: Fix UV BAU destination subnode id

15 years agomm: build_zonelists(): move clear node_load[] to __build_all_zonelists()
Bo Liu [Tue, 18 Aug 2009 21:11:19 +0000 (14:11 -0700)]
mm: build_zonelists(): move clear node_load[] to __build_all_zonelists()

If node_load[] is cleared everytime build_zonelists() is
called,node_load[] will have no help to find the next node that should
appear in the given node's fallback list.

Because of the bug, zonelist's node_order is not calculated as expected.
This bug affects on big machine, which has asynmetric node distance.

[synmetric NUMA's node distance]
     0    1    2
0   10   12   12
1   12   10   12
2   12   12   10

[asynmetric NUMA's node distance]
     0    1    2
0   10   12   20
1   12   10   14
2   20   14   10

This (my bug) is very old but no one has reported this for a long time.
Maybe because the number of asynmetric NUMA is very small and they use
cpuset for customizing node memory allocation fallback.

[akpm@linux-foundation.org: fix CONFIG_NUMA=n build]
Signed-off-by: Bo Liu <bo-liu@hotmail.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoREPORTING-BUGS: add get_maintainer.pl blurb
Joe Perches [Tue, 18 Aug 2009 21:11:18 +0000 (14:11 -0700)]
REPORTING-BUGS: add get_maintainer.pl blurb

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agonommu: check fd read permission in validate_mmap_request()
Graff Yang [Tue, 18 Aug 2009 21:11:17 +0000 (14:11 -0700)]
nommu: check fd read permission in validate_mmap_request()

According to the POSIX (1003.1-2008), the file descriptor shall have been
opened with read permission, regardless of the protection options specified to
mmap().  The ltp test cases mmap06/07 need this.

Signed-off-by: Graff Yang <graff.yang@gmail.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Greg Ungerer <gerg@snapgear.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agospi_s3c24xx: fix transfer setup code
Ben Dooks [Tue, 18 Aug 2009 21:11:17 +0000 (14:11 -0700)]
spi_s3c24xx: fix transfer setup code

Since the changes to the bitbang driver, there is the possibility we will
be called with either the speed_hz or bpw values zero.  We take these to
mean that the default values (8 bits per word, or maximum bus speed).

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agospi_s3c24xx: fix clock rate calculation
Ben Dooks [Tue, 18 Aug 2009 21:11:16 +0000 (14:11 -0700)]
spi_s3c24xx: fix clock rate calculation

Currently the clock rate calculation may round as pleased, which means
that it is possible that we will round down and end up with a faster clock
rate than intended.

Change the calculation to use DIV_ROUND_UP() to ensure that we end up with
a clock rate either the same as or lower than the user requested one.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agommc: add the new linux-mmc mailing list to MAINTAINERS
Andrew Morton [Tue, 18 Aug 2009 21:11:12 +0000 (14:11 -0700)]
mmc: add the new linux-mmc mailing list to MAINTAINERS

There are a number of individual MMC drivers listed in MAINTAINERS.  I
didn't modify those records.  Perhaps I should have.

Cc: <linux-mmc@vger.kernel.org>
Cc: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Nicolas Pitre <nico@cam.org>
Cc: Pierre Ossman <drzeus@drzeus.cx>
Cc: Pavel Pisa <ppisa@pikron.com>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Sascha Sommer <saschasommer@freenet.de>
Cc: Ian Molton <ian@mnementh.co.uk>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: Harald Welte <HaraldWelte@viatech.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agomm: revert "oom: move oom_adj value"
KOSAKI Motohiro [Tue, 18 Aug 2009 21:11:10 +0000 (14:11 -0700)]
mm: revert "oom: move oom_adj value"

The commit 2ff05b2b (oom: move oom_adj value) moveed the oom_adj value to
the mm_struct.  It was a very good first step for sanitize OOM.

However Paul Menage reported the commit makes regression to his job
scheduler.  Current OOM logic can kill OOM_DISABLED process.

Why? His program has the code of similar to the following.

...
set_oom_adj(OOM_DISABLE); /* The job scheduler never killed by oom */
...
if (vfork() == 0) {
set_oom_adj(0); /* Invoked child can be killed */
execve("foo-bar-cmd");
}
....

vfork() parent and child are shared the same mm_struct.  then above
set_oom_adj(0) doesn't only change oom_adj for vfork() child, it's also
change oom_adj for vfork() parent.  Then, vfork() parent (job scheduler)
lost OOM immune and it was killed.

Actually, fork-setting-exec idiom is very frequently used in userland program.
We must not break this assumption.

Then, this patch revert commit 2ff05b2b and related commit.

Reverted commit list
---------------------
- commit 2ff05b2b4e (oom: move oom_adj value from task_struct to mm_struct)
- commit 4d8b9135c3 (oom: avoid unnecessary mm locking and scanning for OOM_DISABLE)
- commit 8123681022 (oom: only oom kill exiting tasks with attached memory)
- commit 933b787b57 (mm: copy over oom_adj value at fork time)

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Paul Menage <menage@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agovfs: make get_sb_pseudo set s_maxbytes to value that can be cast to signed
Jeff Layton [Tue, 18 Aug 2009 21:11:08 +0000 (14:11 -0700)]
vfs: make get_sb_pseudo set s_maxbytes to value that can be cast to signed

get_sb_pseudo sets s_maxbytes to ~0ULL which becomes negative when cast
to a signed value.  Fix it to use MAX_LFS_FILESIZE which casts properly
to a positive signed value.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Steve French <smfrench@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Robert Love <rlove@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoMAINTAINERS: OSD LIBRARY and FILESYSTEM pattern fix
Joe Perches [Tue, 18 Aug 2009 21:11:06 +0000 (14:11 -0700)]
MAINTAINERS: OSD LIBRARY and FILESYSTEM pattern fix

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Benny Halevy <bhalevy@panasas.com>
Cc: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agosecurity: Fix prompt for LSM_MMAP_MIN_ADDR
Andreas Schwab [Tue, 18 Aug 2009 20:14:29 +0000 (22:14 +0200)]
security: Fix prompt for LSM_MMAP_MIN_ADDR

Fix prompt for LSM_MMAP_MIN_ADDR.

(Verbs are cool!)

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
15 years agosecurity: Make LSM_MMAP_MIN_ADDR default match its help text.
Dave Jones [Tue, 18 Aug 2009 17:47:37 +0000 (13:47 -0400)]
security: Make LSM_MMAP_MIN_ADDR default match its help text.

Commit 788084aba2ab7348257597496befcbccabdc98a3 added the LSM_MMAP_MIN_ADDR
option, whose help text states "For most ia64, ppc64 and x86 users with lots
of address space a value of 65536 is reasonable and should cause no problems."
Which implies that it's default setting was typoed.

Signed-off-by: Dave Jones <davej@redhat.com>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
15 years agoMerge branch 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Tue, 18 Aug 2009 20:57:38 +0000 (13:57 -0700)]
Merge branch 'irq-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  genirq: Wake up irq thread after action has been installed

15 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Linus Torvalds [Tue, 18 Aug 2009 20:55:01 +0000 (13:55 -0700)]
Merge git://git./linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (60 commits)
  net: restore gnet_stats_basic to previous definition
  NETROM: Fix use of static buffer
  e1000e: fix use of pci_enable_pcie_error_reporting
  e1000e: WoL does not work on 82577/82578 with manageability enabled
  cnic: Fix locking in init/exit calls.
  cnic: Fix locking in start/stop calls.
  bnx2: Use mutex on slow path cnic calls.
  cnic: Refine registration with bnx2.
  cnic: Fix symbol_put_addr() panic on ia64.
  gre: Fix MTU calculation for bound GRE tunnels
  pegasus: Add new device ID.
  drivers/net: fixed drivers that support netpoll use ndo_start_xmit()
  via-velocity: Fix test of mii_status bit VELOCITY_DUPLEX_FULL
  rt2x00: fix memory corruption in rf cache, add a sanity check
  ixgbe: Fix receive on real device when VLANs are configured
  ixgbe: Do not return 0 in ixgbe_fcoe_ddp() upon FCP_RSP in DDP completion
  netxen: free napi resources during detach
  netxen: remove netxen workqueue
  ixgbe: fix issues setting rx-usecs with legacy interrupts
  can: fix oops caused by wrong rtnl newlink usage
  ...

15 years agoMerge branch 'sh/for-2.6.31' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal...
Linus Torvalds [Tue, 18 Aug 2009 20:54:26 +0000 (13:54 -0700)]
Merge branch 'sh/for-2.6.31' of git://git./linux/kernel/git/lethal/sh-2.6

* 'sh/for-2.6.31' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
  sh: sh7724 ddr self-refresh changes
  sh: use in-soc KEYSC on se7724
  sh: CMT suspend/resume
  sh: skip disabled LCDC channels

15 years agoMerge branch 'for-linus' of git://neil.brown.name/md
Linus Torvalds [Tue, 18 Aug 2009 20:54:08 +0000 (13:54 -0700)]
Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md:
  Fix new incorrect error return from do_md_stop.

15 years agonilfs2: fix oopses with doubly mounted snapshots
Ryusuke Konishi [Tue, 18 Aug 2009 15:29:43 +0000 (00:29 +0900)]
nilfs2: fix oopses with doubly mounted snapshots

will fix kernel oopses like the following:

 # mount -t nilfs2 -r -o cp=20 /dev/sdb1 /test1
 # mount -t nilfs2 -r -o cp=20 /dev/sdb1 /test2
 # umount /test1
 # umount /test2

BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:1069
in_atomic(): 0, irqs_disabled(): 1, pid: 3886, name: umount.nilfs2
1 lock held by umount.nilfs2/3886:
 #0:  (&type->s_umount_key#31){+.+...}, at: [<c10b398a>] deactivate_super+0x52/0x6c
irq event stamp: 1219
hardirqs last  enabled at (1219): [<c135c774>] __mutex_unlock_slowpath+0xf8/0x119
hardirqs last disabled at (1218): [<c135c6d5>] __mutex_unlock_slowpath+0x59/0x119
softirqs last  enabled at (1214): [<c1033316>] __do_softirq+0x1a5/0x1ad
softirqs last disabled at (1205): [<c1033354>] do_softirq+0x36/0x5a
Pid: 3886, comm: umount.nilfs2 Not tainted 2.6.31-rc6 #55
Call Trace:
 [<c1023549>] __might_sleep+0x107/0x10e
 [<c13603c0>] do_page_fault+0x246/0x397
 [<c136017a>] ? do_page_fault+0x0/0x397
 [<c135e753>] error_code+0x6b/0x70
 [<c136017a>] ? do_page_fault+0x0/0x397
 [<c104f805>] ? __lock_acquire+0x91/0x12fd
 [<c1050a62>] ? __lock_acquire+0x12ee/0x12fd
 [<c1050a62>] ? __lock_acquire+0x12ee/0x12fd
 [<c1050b2b>] lock_acquire+0xba/0xdd
 [<d0d17d3f>] ? nilfs_detach_segment_constructor+0x2f/0x2fa [nilfs2]
 [<c135d4fe>] down_write+0x2a/0x46
 [<d0d17d3f>] ? nilfs_detach_segment_constructor+0x2f/0x2fa [nilfs2]
 [<d0d17d3f>] nilfs_detach_segment_constructor+0x2f/0x2fa [nilfs2]
 [<c104ea2c>] ? mark_held_locks+0x43/0x5b
 [<c104ecb1>] ? trace_hardirqs_on_caller+0x10b/0x133
 [<c104ece4>] ? trace_hardirqs_on+0xb/0xd
 [<d0d09ac1>] nilfs_put_super+0x2f/0xca [nilfs2]
 [<c10b3352>] generic_shutdown_super+0x49/0xb8
 [<c10b33de>] kill_block_super+0x1d/0x31
 [<c10e6599>] ? vfs_quota_off+0x0/0x12
 [<c10b398f>] deactivate_super+0x57/0x6c
 [<c10c4bc3>] mntput_no_expire+0x8c/0xb4
 [<c10c5094>] sys_umount+0x27f/0x2a4
 [<c10c50c6>] sys_oldumount+0xd/0xf
 [<c10031a4>] sysenter_do_call+0x12/0x38
 ...

This turns out to be a bug brought by an -rc1 patch ("nilfs2: simplify
remaining sget() use").

In the patch, a new "put resource" function, nilfs_put_sbinfo()
was introduced to delay freeing nilfs_sb_info struct.

But the nilfs_put_sbinfo() mistakenly used atomic_dec_and_test()
function to check the reference count, and it caused the nilfs_sb_info
was freed when user mounted a snapshot twice.

This bug also suggests there was unseen memory leak in usual mount
/umount operations for nilfs.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
15 years agoperf tools: Make 'make html' work
Kyle McMartin [Tue, 18 Aug 2009 16:41:25 +0000 (12:41 -0400)]
perf tools: Make 'make html' work

pushd tools/perf/Documentation
make html
popd

is failing for me...

    ASCIIDOC perf-annotate.html
ERROR: unsafe: include file: /etc/asciidoc/./stylesheets/xhtml11.css
ERROR: unsafe: include file:
/etc/asciidoc/./stylesheets/xhtml11-manpage.css
ERROR: unsafe: include file:
/etc/asciidoc/./stylesheets/xhtml11-quirks.css
make: *** [perf-annotate.html] Error 1

Apparently asciidoc "unsafe" is the default mode of operation
in practice.

https://bugzilla.redhat.com/show_bug.cgi?id=506953

Works tidily now.

Signed-off-by: Kyle McMartin <kyle@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20090818164125.GM25206@bombadil.infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agogenirq: Wake up irq thread after action has been installed
Thomas Gleixner [Mon, 17 Aug 2009 12:07:16 +0000 (14:07 +0200)]
genirq: Wake up irq thread after action has been installed

The wake_up_process() of the new irq thread in __setup_irq() is too
early as the irqaction is not yet fully initialized especially
action->irq is not yet set. The interrupt thread might dereference the
wrong irq descriptor.

Move the wakeup after the action is installed and action->irq has been
set.

Reported-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Buesch <mb@bu3sch.de>
15 years agoperf annotate: Fix segmentation fault
Ingo Molnar [Tue, 18 Aug 2009 11:52:28 +0000 (13:52 +0200)]
perf annotate: Fix segmentation fault

Linus reported this perf annotate segfault:

        [torvalds@nehalem git]$ perf annotate unmap_vmas
        Segmentation fault

        #0  map__clone (self=<value optimized out>) at builtin-annotate.c:236
        #1  thread__fork (self=<value optimized out>) at builtin-annotate.c:372

The bug here was that builtin-annotate.c was a copy of
builtin-report.c and a threading related fix to builtin-report.c
didnt get propagated to builtin-annotate.c ...

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agoperf_counter: Fix the PARISC build
Ingo Molnar [Tue, 18 Aug 2009 09:32:24 +0000 (11:32 +0200)]
perf_counter: Fix the PARISC build

PARISC does not build:

/home/mingo/tip/kernel/perf_counter.c: In function 'perf_counter_index':
/home/mingo/tip/kernel/perf_counter.c:2016: error: 'PERF_COUNTER_INDEX_OFFSET' undeclared (first use in this function)
/home/mingo/tip/kernel/perf_counter.c:2016: error: (Each undeclared identifier is reported only once
/home/mingo/tip/kernel/perf_counter.c:2016: error: for each function it appears in.)

As PERF_COUNTER_INDEX_OFFSET is not defined.

Now, we could define it in the architecture - but lets also provide
a core default of 0 (which happens to be what all but one
architecture uses at the moment).

Architectures that need a different index offset should set this
value in their asm/perf_counter.h files.

Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Helge Deller <deller@gmx.de>
Cc: linux-parisc@vger.kernel.org
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agomicroblaze: Update Microblaze defconfigs
Michal Simek [Tue, 18 Aug 2009 09:05:11 +0000 (11:05 +0200)]
microblaze: Update Microblaze defconfigs

Signed-off-by: Michal Simek <monstr@monstr.eu>
15 years agomicroblaze: Use klimit instead of _end for memory init
Michal Simek [Tue, 11 Aug 2009 10:36:12 +0000 (12:36 +0200)]
microblaze: Use klimit instead of _end for memory init

For noMMU system when you use larger rootfs image
there is problem with using _end label because
we increase klimit but in memory initialization
we use still _end which is wrong. Larger mtd rootfs
was rewritten by init_bootmem_node.

MMU kernel use static initialization where klimit
is setup to _end. There is no any other hanling
with klimit.

Signed-off-by: Michal Simek <monstr@monstr.eu>
15 years agomicroblaze: Enable ppoll syscall
Michal Simek [Thu, 6 Aug 2009 14:00:52 +0000 (16:00 +0200)]
microblaze: Enable ppoll syscall

Signed-off-by: Michal Simek <monstr@monstr.eu>
15 years agomicroblaze: Sane handling of missing timer/intc in device tree
John Williams [Wed, 29 Jul 2009 12:08:40 +0000 (22:08 +1000)]
microblaze: Sane handling of missing timer/intc in device tree

This code path doesn't test any returned pointers for NULL, leading to a bad
kernel page fault if there's no timer/intc found.

Slightly better is to BUG(), but even better still would be a printk beforehand.

Signed-off-by: John Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
15 years agomicroblaze: use the generic ack_bad_irq implementation
Christoph Hellwig [Thu, 6 Aug 2009 21:00:38 +0000 (23:00 +0200)]
microblaze: use the generic ack_bad_irq implementation

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Michal Simek <monstr@monstr.eu>
15 years agonilfs2: missing a read lock for segment writer in nilfs_attach_checkpoint()
Zhang Qiang [Tue, 18 Aug 2009 06:58:24 +0000 (14:58 +0800)]
nilfs2: missing a read lock for segment writer in nilfs_attach_checkpoint()

'ns_cno' of structure 'the_nilfs' must be protected from segment
writer, in other words, the caller of nilfs_get_checkpoint should hold
read lock for nilfs->ns_segctor_sem.  This patch adds the lock/unlock
operations in nilfs_attach_checkpoint() when calling
nilfs_cpfile_get_checkpoint().

Signed-off-by: Zhang Qiang <zhangqiang.buaa@gmail.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
15 years agonet: restore gnet_stats_basic to previous definition
Eric Dumazet [Sun, 16 Aug 2009 09:36:49 +0000 (09:36 +0000)]
net: restore gnet_stats_basic to previous definition

In 5e140dfc1fe87eae27846f193086724806b33c7d "net: reorder struct Qdisc
for better SMP performance" the definition of struct gnet_stats_basic
changed incompatibly, as copies of this struct are shipped to
userland via netlink.

Restoring old behavior is not welcome, for performance reason.

Fix is to use a private structure for kernel, and
teach gnet_stats_copy_basic() to convert from kernel to user land,
using legacy structure (struct gnet_stats_basic)

Based on a report and initial patch from Michael Spang.

Reported-by: Michael Spang <mspang@csclub.uwaterloo.ca>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 years agoNETROM: Fix use of static buffer
Ralf Baechle [Tue, 18 Aug 2009 01:05:32 +0000 (18:05 -0700)]
NETROM: Fix use of static buffer

The static variable used by nr_call_to_digi might result in corruption if
multiple threads are trying to usee a node or neighbour via ioctl.  Fixed
by having the caller pass a structure in.  This is safe because nr_add_node
rsp. nr_add_neigh will allocate a permanent structure, if needed.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 years agoFix new incorrect error return from do_md_stop.
NeilBrown [Tue, 18 Aug 2009 00:35:26 +0000 (10:35 +1000)]
Fix new incorrect error return from do_md_stop.

Recent commit c8c00a6915a2e3d10416e8bdd3138429beb96210
changed the exit paths in do_md_stop and was not quite
careful enough.  There is one path were 'err' now needs
to be cleared but it isn't.
So setting an array to readonly (with mdadm --readonly) will
work, but will incorrectly report and error: ENXIO.

Signed-off-by: NeilBrown <neilb@suse.de>
15 years agoMerge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
Linus Torvalds [Mon, 17 Aug 2009 20:39:52 +0000 (13:39 -0700)]
Merge branch 'upstream' of git://ftp.linux-mips.org/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  MIPS: Fix HPAGE_SIZE redefinition

15 years agoMerge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
Linus Torvalds [Mon, 17 Aug 2009 20:39:30 +0000 (13:39 -0700)]
Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs

* 'for-linus' of git://oss.sgi.com/xfs/xfs:
  xfs: fix locking in xfs_iget_cache_hit

15 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Mon, 17 Aug 2009 20:38:58 +0000 (13:38 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/security-testing-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
  security: define round_hint_to_min in !CONFIG_SECURITY
  Security/SELinux: seperate lsm specific mmap_min_addr
  SELinux: call cap_file_mmap in selinux_file_mmap
  Capabilities: move cap_file_mmap to commoncap.c

15 years agoinotify: start watch descriptor count at 1
Eric Paris [Mon, 17 Aug 2009 01:51:55 +0000 (21:51 -0400)]
inotify: start watch descriptor count at 1

The inotify_add_watch man page specifies that inotify_add_watch() will
return a non-negative integer.  However, historically the inotify
watches started at 1, not at 0.

Turns out that the inotifywait program provided by the inotify-tools
package doesn't properly handle a 0 watch descriptor.  In 7e790dd5 we
changed from starting at 1 to starting at 0.  This patch starts at 1,
just like in previous kernels, but also just like in previous kernels
it's possible for it to wrap back to 0.  This preserves the kernel
functionality exactly like it was before the patch (neither method broke
the spec)

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>