Commit graph

152329 commits

Author SHA1 Message Date
Jeff Mahoney
1d965fe0eb reiserfs: fix warnings with gcc 4.4
Several code paths in reiserfs have a construct like:

 if (is_direntry_le_ih(ih = B_N_PITEM_HEAD(src, item_num))) ...

which, in addition to being ugly, end up causing compiler warnings with
gcc 4.4.0.  Previous compilers didn't issue a warning.

fs/reiserfs/do_balan.c:1273: warning: operation on `aux_ih' may be undefined
fs/reiserfs/lbalance.c:393: warning: operation on `ih' may be undefined
fs/reiserfs/lbalance.c:421: warning: operation on `ih' may be undefined
fs/reiserfs/lbalance.c:777: warning: operation on `ih' may be undefined

I believe this is due to the ih being passed to macros which evaluate the
argument more than once.  This is old code and we haven't seen any
problems with it, but this patch eliminates the warnings.

It converts the multiple evaluation macros to static inlines and does a
preassignment for the cases that were causing the warnings because that
code is just ugly.

Reported-by: Chris Mason <mason@oracle.com>
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:46 -07:00
Roel Kluin
37044c86ba ufs: sector_t cannot be negative
unsigned i_block,fragment cannot be negative.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:46 -07:00
Jan Kara
5404ac8e44 isofs: cleanup mount option processing
Remove unused variables from isofs_sb_info (used to be some mount
options), unify variables for option to use 0/1 (some options used
'y'/'n'), use bit fields for option flags in superblock.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:45 -07:00
Jan Kara
5c4a656b7e isofs: fix setting of uid and gid to 0
isofs allows setting of default uid and gid of files but value 0 was used
to indicate that user did not specify any uid/gid mount option.  Since
this option also overrides uid/gid set in Rock Ridge extension, it makes
sense to allow forcing uid/gid 0.  Fix option processing to allow this.

Cc: <Hans-Joachim.Baader@cjt.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:45 -07:00
Jan Kara
52b680c812 isofs: let mode and dmode mount options override rock ridge mode setting
So far, permissions set via 'mode' and/or 'dmode' mount options were
effective only if the medium had no rock ridge extensions (or was mounted
without them).  Add 'overriderockmode' mount option to indicate that these
options should override permissions set in rock ridge extensions.  Maybe
this should be default but the current behavior is there since mount
options were created so I think we should not change how they behave.

Cc: <Hans-Joachim.Baader@cjt.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:45 -07:00
Jan Kara
ef43618a47 ext3: make sure inode is deleted from orphan list after truncate
As Ted pointed out, it can happen that ext3_truncate() returns without
removing inode from orphan list.  This way we could in some rare cases
(like when we get ENOMEM from an allocation in ext3_truncate called
because of failed ext3_write_begin) leave the inode on orphan list and
that triggers assertion failure on umount.

So make ext3_truncate() always remove inode from in-memory orphan list.

Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:45 -07:00
Hisashi Hifumi
6f3f1cb21f jbd: clean up journal_try_to_free_buffers()
I delete the following patch
"commit 3f31fddfa2
Author: Mingming Cao <cmm@us.ibm.com>
Date:   Fri Jul 25 01:46:22 2008 -0700

    jbd: fix race between free buffer and commit transaction

This patch is no longer needed because if race between freeing buffer and
committing transaction functionality occurs and dio gets error, currently
dio falls back to buffered IO by the following patch.

	commit 6ccfa806a9
	Author: Hisashi Hifumi <hifumi.hisashi@oss.ntt.co.jp>
	Date:   Tue Sep 2 14:35:40 2008 -0700

   	VFS: fix dio write returning EIO when try_to_release_page fails

Signed-off-by: Hisashi Hifumi <hifumi.hisashi@oss.ntt.co.jp>
Cc: Theodore Tso <tytso@mit.edu>
Cc: Mingming Cao <cmm@us.ibm.com>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:45 -07:00
Jan Kara
e8ef7aaea7 ext3: fix chain verification in ext3_get_blocks()
Chain verification in ext3_get_blocks() has been hosed since it called
verify_chain(chain, NULL) which always returns success.  As a result
readers could in theory race with truncate.  On the other hand the race
probably cannot happen with the current locking scheme, since by the
time ext3_truncate() is called all the pages are already removed and
hence get_block() shouldn't be called on such pages...

Signed-off-by: Jan Kara <jack@suse.cz>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:45 -07:00
Michael Shields
ce05b2a9db Doc fix: ext2 can only have 32,000 subdirs, not 32,768
ext2.txt says that dirs can have 32,768 subdirs, but the actual value of
EXT2_LINK_MAX is 32000.

ext3 is the same, but the doc does not mention it.  One of ext4's features
is to "fix 32000 subdirectory limit".

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:44 -07:00
Jan Kara
39fe7557b4 ext2: Do not update mtime of a moved directory
One of our users is complaining that his backup tool is upset on ext2
(while it's happy on ext3, xfs, ...) because of the mtime change.

The problem is:

    mkdir foo
    mkdir bar
    mkdir foo/a

Now under ext2:
    mv foo/a foo/b

changes mtime of 'foo/a' (foo/b after the move).  That does not really
make sense and it does not happen under any other filesystem I've seen.

More complicated is:
    mv foo/a bar/a

This changes mtime of foo/a (bar/a after the move) and it makes some
sense since we had to update parent directory pointer of foo/a.  But
again, no other filesystem does this.  So after some thoughts I'd vote
for consistency and change ext2 to behave the same as other filesystems.

Do not update mtime of a moved directory.  Specs don't say anything
about it (neither that it should, nor that it should not be updated) and
other common filesystems (ext3, ext4, xfs, reiserfs, fat, ...) don't do
it.  So let's become more consistent.

Spotted by ronny.pretzsch@dfs.de, initial fix by Jörn Engel.

Reported-by: <ronny.pretzsch@dfs.de>
Cc: <hare@suse.de>
Cc: Jörn Engel <joern@logfs.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:44 -07:00
Nate Case
10dfb54cd5 gpio: pca953x: Add support for PCA9556
PCA9556 is the software-compatible predecessor to the PCA9557, so add it
to the supported I2C device ID table.

Signed-off-by: Nate Case <ncase@xes-inc.com>
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>
2009-06-18 13:03:44 -07:00
Nate Case
1965d30356 gpio: pca953x: Get platform_data from OpenFirmware
On OpenFirmware platforms, it makes the most sense to get platform_data
from the device tree.  Make an attempt to translate OF node properties
into platform_data struct before bailing out.

Note that the implementation approach taken differs from other device
drivers that make use of device tree information.  This is because I2C
chips are already registered automatically by of_i2c, so we can get by
with a small translator function in the driver.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: kfree(NULL) is legal]
Signed-off-by: Nate Case <ncase@xes-inc.com>
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>
2009-06-18 13:03:44 -07:00
Mike Frysinger
de3483b071 gpio: max7301: add missing __devexit marking
The remove member of the spi_driver max7301_driver uses __devexit_p(), so
the remove function itself should be marked with __devexit.  Even more so
considering the probe function is marked with __devinit.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Juergen Beisert <j.beisert@pengutronix.de>
Cc: Dmitry Baryshkov <dbaryshkov@gmail.com>
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>
2009-06-18 13:03:44 -07:00
Daniel Silverstone
77906a5461 pca953x: support GPIOLIB GPIO naming
Add support to the PCA953x driver to use the GPIOLIB naming facility for
GPIOs.

Signed-off-by: Daniel Silverstone <dsilvers@simtec.co.uk>
Cc: Ben Gardner <bgardner@wabtec.com>
Cc: Jean Delvare <khali@linux-fr.org>
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>
2009-06-18 13:03:44 -07:00
Mike Frysinger
7bfa58dd4a drivers/char/rtc: disable legacy RTC driver on Blackfin systems
Blackfin platforms do not support the hardware which this driver drives.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:43 -07:00
Atsushi Nemoto
014b6e90a3 rtc-ds1553: drop IRQF_SHARED
IRQF_SHARED should not be used with IRQF_DISABLED.  There is no in-tree
user of this driver and only out-of-tree user I know uses a dedicated irq
line for this RTC.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Alessandro Zummo <a.zummo@towertech.it>
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>
2009-06-18 13:03:43 -07:00
Atsushi Nemoto
0a817f7f5d rtc-tx4939: drop IRQF_SHARED
IRQF_SHARED should not be used with IRQF_DISABLED.  This RTC have a
dedicated irq line to SoC's internal interrupt controller so there is
no reason to use IRQF_SHARED.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Alessandro Zummo <a.zummo@towertech.it>
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>
2009-06-18 13:03:43 -07:00
Wolfgang Grandegger
3c2b9075cb rtc: add stand-alone driver for RX8025 chip
Add support for the Epson RX-8025SA/NB RTC chips.  It includes support for
alarms, periodic interrupts (1 Hz) and clock precision adjustment.

For clock precision adjustment, the SYSFS file "clock_adjust_ppb" gets
created in "/sys/class/rtc/rtcX/device".  It permits to set and get the
clock adjustment in ppb (parts per billion), e.g.:

  # echo -183000 > /sys/class/rtc/rtc0/device/clock_adjust_ppb
  # cat /sys/class/rtc/rtc0/device/clock_adjust_ppb
  -183000

This allows to compensate temperature dependent clock drifts.  According
to the RX8025 SA/NB application manual the frequency and temperature
characteristics can be approximated using the following equation:

  df = a * (ut - t)**2

  df: Frequency deviation in any temperature
  a : Coefficient = (-35 +-5) * 10**-9
  ut: Ultimate temperature in degree = +25 +-5 degree
  t : Any temperature in degree

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Sergei Poselenov <sposelenov@emcraft.com>
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
Signed-off-by: Dmitry Rakhchev <rda@emcraft.com>
Signed-off-by: Matthias Fuchs <matthias.fuchs@esd.eu>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
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>
2009-06-18 13:03:43 -07:00
Wolfram Sang
97f902b7be rtc: rtc-ds1307 add ds3231
Add ds3231 variant.  For that, the BBSQI bit position was changed from a
simple define into a lookup-array as it differs.  This also removes
writing to an unused bit in case of the ds1337.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:43 -07:00
Joakim Tjernlund
33df2ee1bb rtc: rtc-ds1307 add ds1388
Extend the ds1307 driver to support ds1388 too.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
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>
2009-06-18 13:03:43 -07:00
Torsten Ertbjerg Rasmussen
3a72970054 rtc: rtc-ds1742 nvram attribute fix
The RTC driver for ds1742 / ds1743 uses a static nvram attribute.  This
patch replaces this static attribute with one nvram attribute for each
ds174x registered.

The nvram size is not the same for all types of ds174x.  The nvram size is
accessible as the file size of the nvram attribute in sysfs.  With only a
single nvram attribute, this file size will be incorrect if more than one
type of ds174x is present on a system.  See the comment in the removed
code below.

This patch have been tested with linux-2.6.28 and linux-2.6.29-rc5/6 on a
custom board with one ds1743.

Signed-off-by: Torsten Ertbjerg Rasmussen <ertbjerg@gmail.com>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
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>
2009-06-18 13:03:43 -07:00
Jiri Pirko
275704970c spi: fix spi_write_then_read() comment
Buffer needs not be dma-safe, not rx data length.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
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>
2009-06-18 13:03:42 -07:00
Daniel Ribeiro
50e0a7bd02 pxa2xx_spi: fix for SPI_CS_HIGH
Commit a7bb3909b3 ("spi: pxa2xx_spi:
introduce chipselect GPIO to simplify the common cases") introduces
chipselect GPIO, and configures the CS polarity using SPI_CS_HIGH
spi->mode flag.  Add SPI_CS_HIGH to the allowed modes.

Signed-off-by: Daniel Ribeiro <drwyrm@gmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:42 -07:00
Anton Vorontsov
7390284290 mpc52xx_psc_spi: convert to cs_control callback
mpc52xx_psc_spi driver is the last user of the legacy activate_cs and
deactivate_cs callbacks, so convert the driver to the cs_control hook and
remove the legacy callbacks from fsl_spi_platform_data struct.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:42 -07:00
David Brownell
e7db06b5d5 spi: move more spi_setup() functionality into core
Move some common spi_setup() error checks into the SPI framework from the
spi_master controller drivers:

 - Add a new "mode_bits" field to spi_master

 - Use that in spi_setup to validate the spi->mode value being
   requested.  Setting this new field is now mandatory for any
   controller supporting more than vanilla SPI_MODE_0.

 - Update all spi_master drivers to:

     * Initialize that field
     * Remove current spi_setup() checks using that value.

This is a net minor code shrink.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:42 -07:00
David Brownell
7d0771970c spi: move common spi_setup() functionality into core
Start moving some spi_setup() functionality into the SPI core from the
various spi_master controller drivers:

 - Make that function stop being an inline;

 - Move two common idioms from drivers into that new function:
    * Default bits_per_word to 8 if that field isn't set
    * Issue a standardized dev_dbg() message

This is a net minor source code shrink, and supports enhancments found in
some follow-up patches.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:42 -07:00
Roel Kluin
b4bd2ababd spi_bfin5xx: limit reaches -1
bfin_spi_flush() returns limit, which reaches -1 upon timeout.  but in
function bfin_spi_pump_transfers() it is compared with 0.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:41 -07:00
Stefani Seibold
349888ee7b proc.txt: update kernel filesystem/proc.txt documentation
An update for the "Process-Specific Subdirectories" section to reflect the
changes till kernel 2.6.30.

Signed-off-by: Stefani Seibold <stefani@seibold.net>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:41 -07:00
Cyrill Gorcunov
2f6d311080 proc: vmcore - use kzalloc in get_new_element()
Instead of kmalloc+memset better use straight kzalloc

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:41 -07:00
Michal Simek
bcac2b1b7d procfs: remove sparse errors in proc_devtree.c
CHECK   fs/proc/proc_devtree.c
fs/proc/proc_devtree.c:197:14: warning: Using plain integer as NULL pointer
fs/proc/proc_devtree.c:203:34: warning: Using plain integer as NULL pointer
fs/proc/proc_devtree.c:210:14: warning: Using plain integer as NULL pointer
fs/proc/proc_devtree.c:223:26: warning: Using plain integer as NULL pointer
fs/proc/proc_devtree.c:226:14: warning: Using plain integer as NULL pointer

Signed-off-by: Michal Simek <monstr@monstr.eu>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:41 -07:00
Davide Libenzi
3fe4a975d6 epoll: fix nested calls support
This fixes a regression in 2.6.30.

I unfortunately accepted a patch time ago, to drop the "current" usage
from possible IRQ context, w/out proper thought over it.  The patch
switched to using the CPU id by bounding the nested call callback with a
get_cpu()/put_cpu().

Unfortunately the ep_call_nested() function can be called with a callback
that grabs sleepy locks (from own f_op->poll()), that results in epic
fails.  The following patch uses the proper "context" depending on the
path where it is called, and on the kind of callback.

This has been reported by Stefan Richter, that has also verified the patch
is his previously failing environment.

Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Reported-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:41 -07:00
Andrew Morton
36025a812e MAINTAINERS: fbdev is orphaned
Tony hasn't been heard from in 18 months and people keep sending him
things.

Cc: Joe Perches <joe@perches.com>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:41 -07:00
Keika Kobayashi
d3d64df21d proc: export statistics for softirq to /proc
Export statistics for softirq in /proc/softirqs and /proc/stat.

1. /proc/softirqs
Implement /proc/softirqs which shows the number of softirq
for each CPU like /proc/interrupts.

2. /proc/stat
Add the "softirq" line to /proc/stat.
This line shows the number of softirq for all cpu.
The first column is the total of all softirqs and
each subsequent column is the total for particular softirq.

[kosaki.motohiro@jp.fujitsu.com: remove redundant for_each_possible_cpu() loop]
Signed-off-by: Keika Kobayashi <kobayashi.kk@ncos.nec.co.jp>
Reviewed-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:41 -07:00
Robin Getz
9d9b8fb0e5 irqs: add IRQF_SAMPLE_RANDOM to the feature-removal-schedule.txt (deprecated) list
This adds IRQF_SAMPLE_RANDOM to the feature-removal (deprecated) list
since most of the IRQF_SAMPLE_RANDOM users are technically bogus as
entropy sources in the kernel's current entropy model.

This was discussed on the lkml the past few days, which started here:
http://lkml.org/lkml/2009/4/6/283

Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:40 -07:00
Keika Kobayashi
aa0ce5bbc2 softirq: introduce statistics for softirq
Statistics for softirq doesn't exist.
It will be helpful like statistics for interrupts.
This patch introduces counting the number of softirq,
which will be exported in /proc/softirqs.

When softirq handler consumes much CPU time,
/proc/stat is like the following.

$ while :; do  cat /proc/stat | head -n1 ; sleep 10 ; done
cpu  88 0 408 739665 583 28 2 0 0
cpu  450 0 1090 740970 594 28 1294 0 0
                              ^^^^
                             softirq

In such a situation,
/proc/softirqs shows us which softirq handler is invoked.
We can see the increase rate of softirqs.

<before>
$ cat /proc/softirqs
                CPU0       CPU1       CPU2       CPU3
HI                 0          0          0          0
TIMER         462850     462805     462782     462718
NET_TX             0          0          0        365
NET_RX          2472          2          2         40
BLOCK              0          0        381       1164
TASKLET            0          0          0        224
SCHED         462654     462689     462698     462427
RCU             3046       2423       3367       3173

<after>
$ cat /proc/softirqs
                CPU0       CPU1       CPU2       CPU3
HI                 0          0          0          0
TIMER         463361     465077     465056     464991
NET_TX            53          0          1        365
NET_RX          3757          2          2         40
BLOCK              0          0        398       1170
TASKLET            0          0          0        224
SCHED         463074     464318     464612     463330
RCU             3505       2948       3947       3673

When CPU TIME of softirq is high,
the rates of increase is the following.
  TIMER  : 220/sec     : CPU1-3
  NET_TX : 5/sec       : CPU0
  NET_RX : 120/sec     : CPU0
  SCHED  : 40-200/sec  : all CPU
  RCU    : 45-58/sec   : all CPU

The rates of increase in an idle mode is the following.
  TIMER  : 250/sec
  SCHED  : 250/sec
  RCU    : 2/sec

It seems many softirqs for receiving packets and rcu are invoked.  This
gives us help for checking system.

Signed-off-by: Keika Kobayashi <kobayashi.kk@ncos.nec.co.jp>
Reviewed-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:40 -07:00
Matthew Wilcox
1d89b30cc9 ia64: Fix resource assignment for root busses
ia64 was assigning resources to root busses after allocations had
been made for child busses.  Calling pcibios_setup_root_windows() from
pcibios_fixup_bus() solves this problem by assigning the resources to
the root bus before child busses are scanned.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Tested-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-17 14:04:42 -07:00
Matthew Wilcox
a76117dfd6 x86: Use pci_claim_resource
Instead of open-coding pci_find_parent_resource and request_resource,
just call pci_claim_resource.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-17 14:04:42 -07:00
Matthew Wilcox
a6c140969b Delete pcibios_select_root
This function was only used by pci_claim_resource(), and the last commit
deleted that use.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-17 14:04:42 -07:00
Matthew Wilcox
cebd78a8c5 Fix pci_claim_resource
Instead of starting from the iomem or ioport roots, start from the
parent bus' resources.  This fixes a bug where child resources would
appear above their parents resources if they had the same size.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Tested-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-17 14:04:42 -07:00
Linus Torvalds
7cc4766219 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] Convert ia64 to use int-ll64.h
  [IA64] Fix build error in paravirt_patchlist.c
  [IA64] ia64 does not need umount2() syscall
  [IA64] hook up new rt_tgsigqueueinfo syscall
  [IA64] msi_ia64.c dmar_msi_type should be static
  [IA64] remove obsolete hw_interrupt_type
  [IA64] remove obsolete irq_desc_t typedef
  [IA64] remove obsolete no_irq_type
  [IA64] unexport fpswa.h
2009-06-17 11:53:48 -07:00
Linus Torvalds
55a6fbf8fc Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6:
  mfd: early init for MFD running regulators
  mfd: fix tmio related warnings
  mfd: asic3: enable SD/SDIO cell
  mfd: asic3: enable DS1WM cell
  mfd: asic3: remove SD/SDIO controller register definitions
  mfd: asic3: use resource_size macro instead of local variable
  mfd: add ASIC3 IRQ numbers
  mfd: asic3: add clock handling for MFD cells
  mfd: asic3: add asic3_set_register common operation
  mfd: Fix Kconfig help text for WM8350
  mfd: add PCAP driver
  mfd: add U300 AB3100 core support
  drivers/mfd: remove obsolete irq_desc_t typedef
  mfd/pcf50633-gpio.c: add MODULE_LICENSE
  mfd: Mark WM8350 mask revision as readable to match silicon
  mfd: Mark clocks_init as non-init in twl4030-core.c
  mfd: Correct readability of WM8350 register 227
2009-06-17 11:41:49 -07:00
Linus Torvalds
3fe0344faf Merge branch 'kmemleak' of git://linux-arm.org/linux-2.6
* 'kmemleak' of git://linux-arm.org/linux-2.6:
  kmemleak: Fix some typos in comments
  kmemleak: Rename kmemleak_panic to kmemleak_stop
  kmemleak: Only use GFP_KERNEL|GFP_ATOMIC for the internal allocations
2009-06-17 10:42:21 -07:00
Samuel Ortiz
2021de874e mfd: early init for MFD running regulators
For MFDs running regulator cores, we really want them to be brought up early
during boot.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Mike Rapoport <mike@compulab.co.il>
2009-06-17 19:41:54 +02:00
Samuel Ortiz
4d3792e054 mfd: fix tmio related warnings
We can not have .driver_data as const since platform_set_drvdata() doesnt take
a const.
The hclk mmc_data field can be const though.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-06-17 19:41:52 +02:00
Philipp Zabel
09f05ce851 mfd: asic3: enable SD/SDIO cell
This enables the ASIC3's SD/SDIO MFD cell, supported by the tmio_mmc driver.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-06-17 19:41:50 +02:00
Philipp Zabel
9461f65a85 mfd: asic3: enable DS1WM cell
This enables the ASIC3's DS1WM MFD cell, supported by the ds1wm driver.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-06-17 19:41:48 +02:00
Philipp Zabel
1b89040c3a mfd: asic3: remove SD/SDIO controller register definitions
Only the base addresses remain, as they are needed to set up
the IOMEM resources.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-06-17 19:41:45 +02:00
Philipp Zabel
be584bd5a4 mfd: asic3: use resource_size macro instead of local variable
This should make the code a little bit easier to read.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-06-17 19:41:44 +02:00
Philipp Zabel
01906d6d78 mfd: add ASIC3 IRQ numbers
IRQ number definitions for PWM, LED, SPI and OWM (ds1wm).

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-06-17 19:41:43 +02:00
Philipp Zabel
e956a2a87c mfd: asic3: add clock handling for MFD cells
Since ASIC3 has to work on both PXA and S3C and since their
struct clk implementations differ, we can't register out
clocks with the clkdev mechanism (yet?).
For now we have to keep clock handling internal to this
driver and enable/disable the clocks via the
mfd_cell->enable/disable functions.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-06-17 19:41:41 +02:00