]> git.karo-electronics.de Git - karo-tx-linux.git/log
karo-tx-linux.git
11 years agodrivers/rtc/rtc-vt8500.c: convert to use devm_kzalloc
Devendra Naga [Fri, 9 Nov 2012 03:04:58 +0000 (14:04 +1100)]
drivers/rtc/rtc-vt8500.c: convert to use devm_kzalloc

Replace the kzalloc() and kfree() calls with devm_kzalloc().

Signed-off-by: Devendra Naga <devendra.aaru@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexey Charkov <alchark@gmail.com>
Acked-by: Tony Prisk <linux@prisktech.co.nz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agoARM: mach-imx: support for DryIce RTC in i.MX53
Roland Stigge [Fri, 9 Nov 2012 03:04:57 +0000 (14:04 +1100)]
ARM: mach-imx: support for DryIce RTC in i.MX53

Enable support for i.MX53 in addition to i.MX25 by providing a dummy clock
on i.MX53 since this one doesn't have a separate clock for internal RTC
but the driver requests one.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/rtc/rtc-imxdi.c: add devicetree support
Roland Stigge [Fri, 9 Nov 2012 03:04:57 +0000 (14:04 +1100)]
drivers/rtc/rtc-imxdi.c: add devicetree support

Add device tree support to the rtc-imxdi driver.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/rtc/rtc-imxdi: support for i.MX53
Roland Stigge [Fri, 9 Nov 2012 03:04:57 +0000 (14:04 +1100)]
drivers/rtc/rtc-imxdi: support for i.MX53

Enable support for i.MX53 in addition to i.MX25 by enabling the driver on
ARCH_MXC generally.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agortc: omap: add runtime pm support
Vaibhav Hiremath [Fri, 9 Nov 2012 03:04:56 +0000 (14:04 +1100)]
rtc: omap: add runtime pm support

OMAP1 RTC driver is used in multiple devices like, OMAPL138 and AM33XX.
Driver currently doesn't handle any clocks, which may be right for OMAP1
architecture but in case of AM33XX, the clock/module needs to be enabled
in order to access the registers.

So convert this driver to runtime pm, which internally handles rest.

[afzal@ti.com: handle error path]
Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Daniel Mack <zonque@gmail.com>
Cc: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agortc: omap: depend on am33xx
Afzal Mohammed [Fri, 9 Nov 2012 03:04:56 +0000 (14:04 +1100)]
rtc: omap: depend on am33xx

rtc-omap driver can be reused for AM33xx RTC.  Provide dependency in
Kconfig.

Signed-off-by: Afzal Mohammed <afzal@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Daniel Mack <zonque@gmail.com>
Cc: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agortc: omap: dt support
Afzal Mohammed [Fri, 9 Nov 2012 03:04:56 +0000 (14:04 +1100)]
rtc: omap: dt support

Enhance rtc-omap driver with DT capability

Signed-off-by: Afzal Mohammed <afzal@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Daniel Mack <zonque@gmail.com>
Cc: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agoARM: davinci: remove rtc kicker release
Afzal Mohammed [Fri, 9 Nov 2012 03:04:55 +0000 (14:04 +1100)]
ARM: davinci: remove rtc kicker release

rtc-omap driver is now capable of handling kicker mechanism, hence remove
kicker handling at platform level, instead provide proper device name so
that driver can handle kicker mechanism by itself

Signed-off-by: Afzal Mohammed <afzal@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Daniel Mack <zonque@gmail.com>
Cc: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agortc: omap: kicker mechanism support
Afzal Mohammed [Fri, 9 Nov 2012 03:04:55 +0000 (14:04 +1100)]
rtc: omap: kicker mechanism support

OMAP RTC IP can have kicker feature.  This prevents spurious writes to
register.  To write to registers kicker lock has to be released.
Procedure to do it as follows,

1. write to kick0 register, 0x83e70b13
2. write to kick1 register, 0x95a4f1e0

Writing value other than 0x83e70b13 to kick0 enables write locking, more
details about kicker mechanism can be found in section 20.3.3.5.3 of
AM335X TRM @www.ti.com/am335x

Here id table information is added and is used to distinguish those that
require kicker handling and the ones that doesn't need it.  There are more
features in the newer IP's compared to legacy ones other than kicker,
which driver currently doesn't handle, supporting additional features
would be easier with the addition of id table.

Older IP (of OMAP1) doesn't have revision register as per TRM, so revision
register can't be relied always to find features, hence id table is being
used.

While at it, replace __raw_writeb/__raw_readb with writeb/readb; this
driver is used on ARMv7 (AM335X SoC)

Signed-off-by: Afzal Mohammed <afzal@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Daniel Mack <zonque@gmail.com>
Cc: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobinfmt_elf-fix-corner-case-kfree-of-uninitialized-data-checkpatch-fixes
Andrew Morton [Fri, 9 Nov 2012 03:04:55 +0000 (14:04 +1100)]
binfmt_elf-fix-corner-case-kfree-of-uninitialized-data-checkpatch-fixes

WARNING: line over 80 characters
#24: FILE: fs/binfmt_elf.c:1604:
+ info->psinfo.data = NULL; /* So we don't free this wrongly */

ERROR: code indent should use tabs where possible
#26: FILE: fs/binfmt_elf.c:1606:
+        }$

WARNING: please, no spaces at the start of a line
#26: FILE: fs/binfmt_elf.c:1606:
+        }$

total: 1 errors, 2 warnings, 11 lines checked

NOTE: whitespace errors detected, you may wish to use scripts/cleanpatch or
      scripts/cleanfile

./patches/binfmt_elf-fix-corner-case-kfree-of-uninitialized-data.patch has style problems, please review.

If any of these errors are false positives, please report
them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobinfmt_elf: fix corner case kfree of uninitialized data
Alan Cox [Fri, 9 Nov 2012 03:04:55 +0000 (14:04 +1100)]
binfmt_elf: fix corner case kfree of uninitialized data

If elf_core_dump() is called and fill_note_info() fails in the kmalloc()
then it returns 0 but has not yet initialised all the needed fields.  As a
result we do a kfree(randomness) after correctly skipping the thread data.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agoepoll: support for disabling items, and a self-test app
Paton J. Lewis [Fri, 9 Nov 2012 03:04:54 +0000 (14:04 +1100)]
epoll: support for disabling items, and a self-test app

It is not currently possible to reliably delete epoll items when using the
same epoll set from multiple threads.  After calling epoll_ctl with
EPOLL_CTL_DEL, another thread might still be executing code related to an
event for that epoll item (in response to epoll_wait).  Therefore the
deleting thread does not know when it is safe to delete resources
pertaining to the associated epoll item because another thread might be
using those resources.

The deleting thread could wait an arbitrary amount of time after calling
epoll_ctl with EPOLL_CTL_DEL and before deleting the item, but this is
inefficient and could result in the destruction of resources before
another thread is done handling an event returned by epoll_wait.

This patch enhances epoll_ctl to support EPOLL_CTL_DISABLE, which disables
an epoll item.  If epoll_ctl returns -EBUSY in this case, then another
thread may handling a return from epoll_wait for this item.  Otherwise if
epoll_ctl returns 0, then it is safe to delete the epoll item.  This
allows multiple threads to use a mutex to determine when it is safe to
delete an epoll item and its associated resources, which allows epoll
items to be deleted both efficiently and without error in a multi-threaded
environment.  Note that EPOLL_CTL_DISABLE is only useful in conjunction
with EPOLLONESHOT, and using EPOLL_CTL_DISABLE on an epoll item without
EPOLLONESHOT returns -EINVAL.

This patch also adds a new test_epoll self-test program to both
demonstrate the need for this feature and test it.

Signed-off-by: Paton J. Lewis <palewis@adobe.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Paul Holland <pholland@adobe.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agocheckpatch: warn on unnecessary line continuations
Joe Perches [Fri, 9 Nov 2012 03:04:54 +0000 (14:04 +1100)]
checkpatch: warn on unnecessary line continuations

When the previous line is not a line continuation and the current line has
a line continuation but is not a #define, emit a warning.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers-firmware-dmi_scanc-fetch-dmi-version-from-smbios-if-it-exists-checkpatch...
Andrew Morton [Fri, 9 Nov 2012 03:04:54 +0000 (14:04 +1100)]
drivers-firmware-dmi_scanc-fetch-dmi-version-from-smbios-if-it-exists-checkpatch-fixes

WARNING: Prefer pr_info(... to printk(KERN_INFO, ...
#56: FILE: drivers/firmware/dmi_scan.c:426:
+ printk(KERN_INFO "SMBIOS %d.%d present.\n",

WARNING: Prefer pr_info(... to printk(KERN_INFO, ...
#61: FILE: drivers/firmware/dmi_scan.c:431:
+ printk(KERN_INFO "Legacy DMI %d.%d present.\n",

WARNING: Prefer pr_debug(... to printk(KERN_DEBUG, ...
#85: FILE: drivers/firmware/dmi_scan.c:455:
+ printk(KERN_DEBUG "SMBIOS version fixup(2.%d->2.%d)\n",

WARNING: Prefer pr_debug(... to printk(KERN_DEBUG, ...
#90: FILE: drivers/firmware/dmi_scan.c:460:
+ printk(KERN_DEBUG "SMBIOS version fixup(2.%d->2.%d)\n",

total: 0 errors, 4 warnings, 104 lines checked

./patches/drivers-firmware-dmi_scanc-fetch-dmi-version-from-smbios-if-it-exists.patch has style problems, please review.

If any of these errors are false positives, please report
them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Feng Jin <joe.jin@oracle.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/firmware/dmi_scan.c: fetch dmi version from SMBIOS if it exists
Zhenzhong Duan [Fri, 9 Nov 2012 03:04:53 +0000 (14:04 +1100)]
drivers/firmware/dmi_scan.c: fetch dmi version from SMBIOS if it exists

The right dmi version is in SMBIOS if it's zero in DMI region

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Cc: Feng Jin <joe.jin@oracle.com>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers-firmware-dmi_scanc-check-dmi-version-when-get-system-uuid-fix
Andrew Morton [Fri, 9 Nov 2012 03:04:53 +0000 (14:04 +1100)]
drivers-firmware-dmi_scanc-check-dmi-version-when-get-system-uuid-fix

tweak code comment

Cc: Feng Jin <joe.jin@oracle.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/firmware/dmi_scan.c: check dmi version when get system uuid
Zhenzhong Duan [Fri, 9 Nov 2012 03:04:53 +0000 (14:04 +1100)]
drivers/firmware/dmi_scan.c: check dmi version when get system uuid

As of version 2.6 of the SMBIOS specification, the first 3
fields of the UUID are supposed to be little-endian encoded.

Also a minor fix to match variable meaning and mute checkpatch.pl

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Cc: Feng Jin <joe.jin@oracle.com>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agocompat: generic compat_sys_sched_rr_get_interval() implementation
Catalin Marinas [Fri, 9 Nov 2012 03:04:52 +0000 (14:04 +1100)]
compat: generic compat_sys_sched_rr_get_interval() implementation

This function is used by sparc, powerpc tile and arm64 for compat support.
 The patch adds a generic implementation with a wrapper for PowerPC to do
the u32->int sign extension.

The reason for a single patch covering powerpc, tile, sparc and arm64 is
to keep it bisectable, otherwise kernel building may fail with mismatched
function declarations.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Chris Metcalf <cmetcalf@tilera.com> [for tile]
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agopercpu_rw_semaphore: reimplement to not block the readers unnecessarily
Oleg Nesterov [Fri, 9 Nov 2012 03:04:52 +0000 (14:04 +1100)]
percpu_rw_semaphore: reimplement to not block the readers unnecessarily

Currently the writer does msleep() plus synchronize_sched() 3 times to
acquire/release the semaphore, and during this time the readers are
blocked completely.  Even if the "write" section was not actually started
or if it was already finished.

With this patch down_write/up_write does synchronize_sched() twice and
down_read/up_read are still possible during this time, just they use the
slow path.

percpu_down_write() first forces the readers to use rw_semaphore and
increment the "slow" counter to take the lock for reading, then it
takes that rw_semaphore for writing and blocks the readers.

Also.  With this patch the code relies on the documented behaviour of
synchronize_sched(), it doesn't try to pair synchronize_sched() with
barrier.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anton Arapov <anton@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agosscanf: don't ignore field widths for numeric conversions
Jan Beulich [Fri, 9 Nov 2012 03:04:52 +0000 (14:04 +1100)]
sscanf: don't ignore field widths for numeric conversions

This is another step towards better standard conformance.  Rather than
adding a local buffer to store the specified portion of the string (with
the need to enforce an arbitrary maximum supported width to limit the
buffer size), do a maximum width conversion and then drop as much of it as
is necessary to meet the caller's request.

Also fail on negative field widths.

Uses the deprecated simple_strto*() functions because kstrtoXX() fail on
non-zero terminated strings.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/of/fdt.c: re-use kernel's kbasename()
Andy Shevchenko [Fri, 9 Nov 2012 03:04:51 +0000 (14:04 +1100)]
drivers/of/fdt.c: re-use kernel's kbasename()

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agotrace: use kbasename()
Andy Shevchenko [Fri, 9 Nov 2012 03:04:51 +0000 (14:04 +1100)]
trace: use kbasename()

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agoproc_devtree: remove duplicated include from proc_devtree.c
Wei Yongjun [Fri, 9 Nov 2012 03:04:51 +0000 (14:04 +1100)]
proc_devtree: remove duplicated include from proc_devtree.c

Remove duplicated include.

dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agoprocfs: use kbasename()
Andy Shevchenko [Fri, 9 Nov 2012 03:04:50 +0000 (14:04 +1100)]
procfs: use kbasename()

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: use kbasename()
Andy Shevchenko [Fri, 9 Nov 2012 03:04:50 +0000 (14:04 +1100)]
mm: use kbasename()

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agolib: dynamic_debug: use kbasename()
Andy Shevchenko [Fri, 9 Nov 2012 03:04:50 +0000 (14:04 +1100)]
lib: dynamic_debug: use kbasename()

Remove the custom implementation of the functionality similar to kbasename().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Jason Baron <jbaron@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agostring: introduce helper to get base file name from given path
Andy Shevchenko [Fri, 9 Nov 2012 03:04:50 +0000 (14:04 +1100)]
string: introduce helper to get base file name from given path

There are several places in the kernel that use functionality like
basename(3) with the exception: in case of '/foo/bar/' we expect to get an
empty string.  Let's do it common helper for them.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: YAMANE Toshiaki <yamanetoshi@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/video/backlight/ili9320.c: add missing __devexit macros for remove
Jingoo Han [Fri, 9 Nov 2012 03:04:49 +0000 (14:04 +1100)]
drivers/video/backlight/ili9320.c: add missing __devexit macros for remove

The __devexit macros is added to remove function.  The macros moves the
remove function to devexit sections.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/video/backlight/hp680_bl.c: add missing __devexit macros for remove
Jingoo Han [Fri, 9 Nov 2012 03:04:49 +0000 (14:04 +1100)]
drivers/video/backlight/hp680_bl.c: add missing __devexit macros for remove

The __devexit macros is added to remove function.  The macro moves the
remove function to devexit section.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/video/backlight/ep93xx_bl.c: fix section mismatch
Jingoo Han [Fri, 9 Nov 2012 03:04:49 +0000 (14:04 +1100)]
drivers/video/backlight/ep93xx_bl.c: fix section mismatch

Fix section mismatch warning as below:

WARNING: drivers/video/backlight/built-in.o(.data+0x110): Section mismatch in reference from the variable ep93xxbl_driver to the
function .init.text:ep93xxbl_probe()
The variable ep93xxbl_driver references
the function __init ep93xxbl_probe()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/video/backlight/lm3639_bl.c: fix up world writable sysfs file
Axel Lin [Fri, 9 Nov 2012 03:04:48 +0000 (14:04 +1100)]
drivers/video/backlight/lm3639_bl.c: fix up world writable sysfs file

We don't need the sysfs file to be world writable or group writable.
This file is write-only, change it to S_IWUSR (0200).

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: "G.Shark Jeong" <gshark.jeong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/video/backlight/max8925_bl.c: drop devm_kfree of devm_kzalloc'd data
Jingoo Han [Fri, 9 Nov 2012 03:04:48 +0000 (14:04 +1100)]
drivers/video/backlight/max8925_bl.c: drop devm_kfree of devm_kzalloc'd data

devm_kfree() allocates memory that is released when a driver detaches.
Thus, there is no reason to explicitly call devm_kfree in probe or remove
functions.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/video/backlight/88pm860x_bl.c: drop devm_kfree of devm_kzalloc'd data
Jingoo Han [Fri, 9 Nov 2012 03:04:48 +0000 (14:04 +1100)]
drivers/video/backlight/88pm860x_bl.c: drop devm_kfree of devm_kzalloc'd data

devm_kfree() allocates memory that is released when a driver detaches.
Thus, there is no reason to explicitly call devm_kfree() in probe or remove
functions.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/video/backlight/s6e63m0.c: remove unnecessary cast of void pointer
Jingoo Han [Fri, 9 Nov 2012 03:04:47 +0000 (14:04 +1100)]
drivers/video/backlight/s6e63m0.c: remove unnecessary cast of void pointer

Remove unnecessary cast of void pointer for platform data in probe
function.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/video/backlight/vgg2432a4.c: add missing const
Jingoo Han [Fri, 9 Nov 2012 03:04:47 +0000 (14:04 +1100)]
drivers/video/backlight/vgg2432a4.c: add missing const

Add 'const' to static array that was missing it in its definition.  Also,
'const' is added to ili9320_write_regs(), because it is called by
vgg2432a4 driver.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/video/backlight/tdo24m.c: add missing const
Jingoo Han [Fri, 9 Nov 2012 03:04:47 +0000 (14:04 +1100)]
drivers/video/backlight/tdo24m.c: add missing const

Add 'const' to static array that was missing it in its definition.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/video/backlight/lms283gf05.c: add missing const
Jingoo Han [Fri, 9 Nov 2012 03:04:46 +0000 (14:04 +1100)]
drivers/video/backlight/lms283gf05.c: add missing const

Add 'const' to static array that was missing it in its definition.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Marek Vasut <marex@denx.de>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/video/backlight/da9052_bl.c: add missing const
Jingoo Han [Fri, 9 Nov 2012 03:04:46 +0000 (14:04 +1100)]
drivers/video/backlight/da9052_bl.c: add missing const

Add 'const' to static array that was missing it in its definition.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Ashish Jangam <ashish.jangam@kpitcummins.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/video/backlight/lp855x_bl.c: remove unnecessary mutex code
Kim, Milo [Fri, 9 Nov 2012 03:04:46 +0000 (14:04 +1100)]
drivers/video/backlight/lp855x_bl.c: remove unnecessary mutex code

The mutex for accessing lp855x registers is used in case of the user-space
interaction.  When the brightness is changed via sysfs, the mutex is
required.  But the backlight class device already provides it.  Thus, the
lp855x mutex is unnecessary.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Cc: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Bryan Wu <bryan.wu@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers-video-backlight-lp855x_blc-use-generic-pwm-functions-fix
Andrew Morton [Fri, 9 Nov 2012 03:04:45 +0000 (14:04 +1100)]
drivers-video-backlight-lp855x_blc-use-generic-pwm-functions-fix

coding-style simplification, per Thierry

Cc: "Kim, Milo" <Milo.Kim@ti.com>
Cc: Bryan Wu <bryan.wu@canonical.com>
Cc: Milo(Woogyom) Kim <milo.kim@ti.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers/video/backlight/lp855x_bl.c: use generic PWM functions
Kim, Milo [Fri, 9 Nov 2012 03:04:45 +0000 (14:04 +1100)]
drivers/video/backlight/lp855x_bl.c: use generic PWM functions

The LP855x family devices support the PWM input for the backlight control.
 Period of the PWM is configurable in the platform side.  Platform
specific functions are unnecessary anymore because generic PWM functions
are used inside the driver.

(PWM input mode)
To set the brightness, new lp855x_pwm_ctrl() is used.
If a PWM device is not allocated, devm_pwm_get() is called.
The PWM consumer name is from the chip name such as 'lp8550' and 'lp8556'.
To get the brightness value, no additional handling is required.
Just the value of 'props.brightness' is returned.

If the PWM driver is not ready while initializing the LP855x driver, it's
OK.  The PWM device can be retrieved later, when the brightness value is
changed.

Documentation is updated with an example.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Cc: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Bryan Wu <bryan.wu@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: tosa: use devm_gpio_request_one
Jingoo Han [Fri, 9 Nov 2012 03:04:45 +0000 (14:04 +1100)]
backlight: tosa: use devm_gpio_request_one

By using devm_gpio_request_one it is possible to set the direction and
initial value in one shot.  Thus, using devm_gpio_request_one can make the
code simpler.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: lms283gf05: use devm_gpio_request_one
Jingoo Han [Fri, 9 Nov 2012 03:04:44 +0000 (14:04 +1100)]
backlight: lms283gf05: use devm_gpio_request_one

By using devm_gpio_request_one it is possible to set the direction
and initial value in one shot. Thus, using devm_gpio_request_one
can make the code simpler.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: vgg2432a4: fix checkpatch warning
Jingoo Han [Fri, 9 Nov 2012 03:04:44 +0000 (14:04 +1100)]
backlight: vgg2432a4: fix checkpatch warning

This patch fixes the checkpatch warning as below:

WARNING: please, no space before tabs

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: tosa: fix checkpatch error and warning
Jingoo Han [Fri, 9 Nov 2012 03:04:44 +0000 (14:04 +1100)]
backlight: tosa: fix checkpatch error and warning

This patch fixes the checkpatch error and warning as below:

WARNING: line over 80 characters
ERROR: spaces required around that '?' (ctx:VxW)
ERROR: space required after that ',' (ctx:VxV)

Also, unnecessary lines are removed.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: tdo24m: fix checkpatch warning
Jingoo Han [Fri, 9 Nov 2012 03:04:44 +0000 (14:04 +1100)]
backlight: tdo24m: fix checkpatch warning

This patch fixes the checkpatch warning as below:

WARNING: please, no space before tabs

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: platform_lcd: fix checkpatch error
Jingoo Han [Fri, 9 Nov 2012 03:04:43 +0000 (14:04 +1100)]
backlight: platform_lcd: fix checkpatch error

This patch fixes the checkpatch error as below:

ERROR: spaces prohibited around that ':' (ctx:WxW)

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: pcf50633: fix checkpatch warning
Jingoo Han [Fri, 9 Nov 2012 03:04:43 +0000 (14:04 +1100)]
backlight: pcf50633: fix checkpatch warning

This patch fixes the checkpatch warning as below:

WARNING: please, no spaces at the start of a line

Also, long comments are fixed for the preferred style.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: omap1: fix checkpatch warning
Jingoo Han [Fri, 9 Nov 2012 03:04:43 +0000 (14:04 +1100)]
backlight: omap1: fix checkpatch warning

This patch fixes the checkpatch warning as below:

ERROR: inline keyword should sit between storage class and type

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: locomolcd: fix checkpatch error and warning
Jingoo Han [Fri, 9 Nov 2012 03:04:42 +0000 (14:04 +1100)]
backlight: locomolcd: fix checkpatch error and warning

This patch fixes the checkpatch error and warning as below:

WARNING: line over 80 characters
WARNING: space prohibited between function name and open parenthesis '('
ERROR: trailing statements should be on next line

Also, long comments are fixed for the preferred style and
unnecessary lines are removed.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: lm3630: fix checkpatch warning
Jingoo Han [Fri, 9 Nov 2012 03:04:42 +0000 (14:04 +1100)]
backlight: lm3630: fix checkpatch warning

This patch fixes the checkpatch warning as below:

WARNING: static const char * array should probably be static const char * const

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: l4f00242t03: fix checkpatch warning
Jingoo Han [Fri, 9 Nov 2012 03:04:42 +0000 (14:04 +1100)]
backlight: l4f00242t03: fix checkpatch warning

This patch fixes the checkpatch warning as below:

WARNING: please, no space before tabs

Also, unnecessary line is removed.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: jornada720: fix checkpatch error and warning
Jingoo Han [Fri, 9 Nov 2012 03:04:41 +0000 (14:04 +1100)]
backlight: jornada720: fix checkpatch error and warning

This patch fixes the checkpatch error and warning as below:

WARNING: line over 80 characters
ERROR: return is not a function, parentheses are not required

Also, long comments are fixed for the preferred style.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: ili9320: fix checkpatch error and warning
Jingoo Han [Fri, 9 Nov 2012 03:04:41 +0000 (14:04 +1100)]
backlight: ili9320: fix checkpatch error and warning

This patch fixes the checkpatch error and warning as below:

WARNING: please, no space before tabs
WARNING: please, no spaces at the start of a line
WARNING: EXPORT_SYMBOL(foo); should immediately follow its function/variable
WARNING: braces {} are not necessary for single statement blocks
ERROR: code indent should use tabs where possible

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: hp680_bl: fix checkpatch error and warning
Jingoo Han [Fri, 9 Nov 2012 03:04:41 +0000 (14:04 +1100)]
backlight: hp680_bl: fix checkpatch error and warning

This patch fixes the checkpatch error and warning as below:

WARNING: please, no space before tabs
WARNING: please, no spaces at the start of a line
ERROR: do not initialise statics to 0 or NULL
ERROR: code indent should use tabs where possible

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: generic_bl: fix checkpatch warning
Jingoo Han [Fri, 9 Nov 2012 03:04:40 +0000 (14:04 +1100)]
backlight: generic_bl: fix checkpatch warning

This patch fixes the checkpatch warning as below:

WARNING: space prohibited between function name and open parenthesis '('

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: da903x_bl: fix checkpatch warning
Jingoo Han [Fri, 9 Nov 2012 03:04:40 +0000 (14:04 +1100)]
backlight: da903x_bl: fix checkpatch warning

This patch fixes the checkpatch warning as below:

WARNING: please, no space before tabs
WARNING: quoted string split across lines

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: corgi_lcd: fix checkpatch error and warning
Jingoo Han [Fri, 9 Nov 2012 03:04:40 +0000 (14:04 +1100)]
backlight: corgi_lcd: fix checkpatch error and warning

This patch fixes the checkpatch error and warning as below:

WARNING: please, no space before tabs
WARNING: quoted string split across lines
ERROR: space required before the open parenthesis '('

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: atmel-pwm-bl: fix checkpatch warning
Jingoo Han [Fri, 9 Nov 2012 03:04:39 +0000 (14:04 +1100)]
backlight: atmel-pwm-bl: fix checkpatch warning

This patch fixes the checkpatch warning as below:

WARNING: quoted string split across lines

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: 88pm860x_bl: fix checkpatch warning
Jingoo Han [Fri, 9 Nov 2012 03:04:39 +0000 (14:04 +1100)]
backlight: 88pm860x_bl: fix checkpatch warning

This patch fixes the checkpatch warning as below:

WARNING: quoted string split across lines

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agobacklight: da903x_bl: use dev_get_drvdata() instead of platform_get_drvdata()
Jingoo Han [Fri, 9 Nov 2012 03:04:39 +0000 (14:04 +1100)]
backlight: da903x_bl: use dev_get_drvdata() instead of platform_get_drvdata()

dev_get_drvdata() can be used instead of platform_get_drvdata()
to make the code smaller.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrivers: remove reference to feature-removal-schedule.txt
Tao Ma [Fri, 9 Nov 2012 03:04:39 +0000 (14:04 +1100)]
drivers: remove reference to feature-removal-schedule.txt

In 9c0ece069, Linus removed feature-removal-schedule.txt from Documentation,
but there is still some reference to this file. So remove them.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agosound: remove reference to feature-removal-schedule.txt
Tao Ma [Fri, 9 Nov 2012 03:04:38 +0000 (14:04 +1100)]
sound: remove reference to feature-removal-schedule.txt

In 9c0ece069, Linus removed feature-removal-schedule.txt from Documentation,
but there is still some reference to this file. So remove them.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agokernel: remove reference to feature-removal-schedule.txt
Tao Ma [Fri, 9 Nov 2012 03:04:38 +0000 (14:04 +1100)]
kernel: remove reference to feature-removal-schedule.txt

In 9c0ece069, Linus removed feature-removal-schedule.txt from Documentation,
but there is still some reference to this file. So remove them.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agoDocumentation: remove reference to feature-removal-schedule.txt
Tao Ma [Fri, 9 Nov 2012 03:04:38 +0000 (14:04 +1100)]
Documentation: remove reference to feature-removal-schedule.txt

In 9c0ece069, Linus removed feature-removal-schedule.txt from Documentation,
but there is still some reference to this file. So remove them.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agoscripts/tags.sh: add magic for declarations of popular kernel type
Kirill Tkhai [Fri, 9 Nov 2012 03:04:37 +0000 (14:04 +1100)]
scripts/tags.sh: add magic for declarations of popular kernel type

1) Add magic for declarations of variables of popular kernel type like
   spinlock_t, list_head, wait_queue_head_t and other.

2) Add a set of specially handled declaration extentions like
   __attribute, __aligned and other.

3) Simplify pci_bus_* magic

Signed-off-by: Kirill V Tkhai <tkhai@yandex.ru>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agoinclude/linux/init.h: use the stringify operator for the __define_initcall macro
Matthew Leach [Fri, 9 Nov 2012 03:04:37 +0000 (14:04 +1100)]
include/linux/init.h: use the stringify operator for the __define_initcall macro

Currently the __define_initcall() macro takes three arguments, fn, id and
level.  The level argument is exactly the same as the id argument but
wrapped in quotes.  To overcome this need to specify three arguments to
the __define_initcall macro, where one argument is the stringification of
another, we can just use the stringification macro instead.

Signed-off-by: Matthew Leach <matthew@mattleach.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agoDocumentation/kernel-parameters.txt: update mem= option's spec according to its imple...
Wen Congyang [Fri, 9 Nov 2012 03:04:37 +0000 (14:04 +1100)]
Documentation/kernel-parameters.txt: update mem= option's spec according to its implementation

Current mem= implementation seems buggy because the specification and
implementation don't match.  The current mem= has been working for many
years and it's not buggy - it works as expected.  So we should update the
specification.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Cc: Rob Landley <rob@landley.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agoscripts-pnmtologo-fix-for-plain-pbm-checkpatch-fixes
Andrew Morton [Fri, 9 Nov 2012 03:04:36 +0000 (14:04 +1100)]
scripts-pnmtologo-fix-for-plain-pbm-checkpatch-fixes

ERROR: do not initialise statics to 0 or NULL
#24: FILE: scripts/pnmtologo.c:77:
+static int is_plain_pbm = 0;

WARNING: line over 80 characters
#33: FILE: scripts/pnmtologo.c:108:
+  * between the digits. This is Ok cause we know a PBM can only have a '1'

total: 1 errors, 1 warnings, 25 lines checked

./patches/scripts-pnmtologo-fix-for-plain-pbm.patch has style problems, please review.

If any of these errors are false positives, please report
them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Andreas Bießmann <andreas@biessmann.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agoscripts/pnmtologo: fix for plain PBM
Andreas Bießmann [Fri, 9 Nov 2012 03:04:36 +0000 (14:04 +1100)]
scripts/pnmtologo: fix for plain PBM

PBM generated with current tools do not have a whitespace between the
digits.  Therefore the pnmtologo tool fails to gernerate the required
C-Array for these images.  This patch fixes that behaviour and can handle
both 'old style' and 'new style' PBM files.

Signed-off-by: Andreas Bießmann <andreas@biessmann.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm/memblock: reduce overhead in binary search
Wanpeng Li [Fri, 9 Nov 2012 03:04:36 +0000 (14:04 +1100)]
mm/memblock: reduce overhead in binary search

When checking that the indicated address belongs to the memory region, the
memory regions are checked one by one through a binary search, which will
be time consuming.

If the indicated address isn't in the memory region, then we needn't do
the time-consuming search.  Add a check on the indicated address for that
purpose.

Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Gavin Shan <shangw@linux.vnet.ibm.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agoswap-add-a-simple-detector-for-inappropriate-swapin-readahead-fix
Andrew Morton [Fri, 9 Nov 2012 03:04:35 +0000 (14:04 +1100)]
swap-add-a-simple-detector-for-inappropriate-swapin-readahead-fix

tweak code comment

Cc: Hugh Dickins <hughd@google.com>
Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Shaohua Li <shli@fusionio.com>
Cc: Shaohua Li <shli@kernel.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agoswap: add a simple detector for inappropriate swapin readahead
Shaohua Li [Fri, 9 Nov 2012 03:04:35 +0000 (14:04 +1100)]
swap: add a simple detector for inappropriate swapin readahead

The swapin readahead does a blind readahead whether or not the swapin is
sequential.  This is ok for harddisk because large reads have relatively
small costs and if the readahead pages are unneeded they can be reclaimed
easily.  But for SSD devices large reads are more expensive than small
one.  If readahead pages are unneeded, reading them in caused significant
overhead

This patch addes a simple random read detection similar to file mmap
readahead.  If a random read is detected, swapin readahead will be
skipped.  This improves a lot for a swap workload with random IO in a fast
SSD.

I run anonymous mmap write micro benchmark, which will triger swapin/swapout.

runtime changes with patch
randwrite harddisk -38.7%
seqwrite harddisk -1.1%
randwrite SSD -46.9%
seqwrite SSD +0.3%

For both harddisk and SSD, the randwrite swap workload run time is reduced
significantly.  Sequential write swap workload hasn't chanage.

Interestingly, the randwrite harddisk test is improved too.  This might be
because swapin readahead needs to allocate extra memory, which further
tights memory pressure, so more swapout/swapin.

Signed-off-by: Shaohua Li <shli@fusionio.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrop_caches-add-some-documentation-and-info-messsge-checkpatch-fixes
Andrew Morton [Fri, 9 Nov 2012 03:04:35 +0000 (14:04 +1100)]
drop_caches-add-some-documentation-and-info-messsge-checkpatch-fixes

WARNING: Prefer netdev_notice(netdev, ... then dev_notice(dev, ... then pr_notice(...  to printk(KERN_NOTICE ...
#112: FILE: fs/drop_caches.c:61:
+ printk(KERN_NOTICE "%s (%d): dropped kernel caches: %d\n",

WARNING: line over 80 characters
#113: FILE: fs/drop_caches.c:62:
+ current->comm, task_pid_nr(current), sysctl_drop_caches);

total: 0 errors, 2 warnings, 53 lines checked

./patches/drop_caches-add-some-documentation-and-info-messsge.patch has style problems, please review.

If any of these errors are false positives, please report
them to the maintainer, see CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agodrop_caches: add some documentation and info message
Michal Hocko [Fri, 9 Nov 2012 03:04:34 +0000 (14:04 +1100)]
drop_caches: add some documentation and info message

I would like to resurrect Dave's patch.  The last time it was posted was
here https://lkml.org/lkml/2010/9/16/250 and there didn't seem to be any
strong opposition.

Kosaki was worried about possible excessive logging when somebody drops
caches too often (but then he claimed he didn't have a strong opinion on
that) but I would say opposite.  If somebody does that then I would really
like to know that from the log when supporting a system because it almost
for sure means that there is something fishy going on.  It is also worth
mentioning that only root can write drop caches so this is not an flooding
attack vector.

I am bringing that up again because this can be really helpful when
chasing strange performance issues which (surprise surprise) turn out to
be related to artificially dropped caches done because the admin thinks
this would help...

I have just refreshed the original patch on top of the current mm tree
but I could live with KERN_INFO as well if people think that KERN_NOTICE
is too hysterical.

: From: Dave Hansen <dave@linux.vnet.ibm.com>
: Date: Fri, 12 Oct 2012 14:30:54 +0200
:
: There is plenty of anecdotal evidence and a load of blog posts
: suggesting that using "drop_caches" periodically keeps your system
: running in "tip top shape".  Perhaps adding some kernel
: documentation will increase the amount of accurate data on its use.
:
: If we are not shrinking caches effectively, then we have real bugs.
: Using drop_caches will simply mask the bugs and make them harder
: to find, but certainly does not fix them, nor is it an appropriate
: "workaround" to limit the size of the caches.
:
: It's a great debugging tool, and is really handy for doing things
: like repeatable benchmark runs.  So, add a bit more documentation
: about it, and add a little KERN_NOTICE.  It should help developers
: who are chasing down reclaim-related bugs.

[mhocko@suse.cz: refreshed to current -mm tree]
Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: cma: remove watermark hacks
Marek Szyprowski [Fri, 9 Nov 2012 03:04:34 +0000 (14:04 +1100)]
mm: cma: remove watermark hacks

Commits 2139cbe627b89 ("cma: fix counting of isolated pages") and
d95ea5d18e69951 ("cma: fix watermark checking") introduced a reliable
method of free page accounting when memory is being allocated from CMA
regions, so the workaround introduced earlier by commit 49f223a9cd96c72
("mm: trigger page reclaim in alloc_contig_range() to stabilise
watermarks") can be finally removed.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Mel Gorman <mel@csn.ul.ie>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: cma: skip watermarks check for already isolated blocks in split_free_page()
Marek Szyprowski [Fri, 9 Nov 2012 03:04:34 +0000 (14:04 +1100)]
mm: cma: skip watermarks check for already isolated blocks in split_free_page()

Since commit 2139cbe627b8 ("cma: fix counting of isolated pages") free
pages in isolated pageblocks are not accounted to NR_FREE_PAGES counters,
so watermarks check is not required if one operates on a free page in
isolated pageblock.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Mel Gorman <mel@csn.ul.ie>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm, oom: fix race when specifying a thread as the oom origin
David Rientjes [Fri, 9 Nov 2012 03:04:34 +0000 (14:04 +1100)]
mm, oom: fix race when specifying a thread as the oom origin

test_set_oom_score_adj() and compare_swap_oom_score_adj() are used to
specify that current should be killed first if an oom condition occurs in
between the two calls.

The usage is

short oom_score_adj = test_set_oom_score_adj(OOM_SCORE_ADJ_MAX);
...
compare_swap_oom_score_adj(OOM_SCORE_ADJ_MAX, oom_score_adj);

to store the thread's oom_score_adj, temporarily change it to the maximum
score possible, and then restore the old value if it is still the same.

This happens to still be racy, however, if the user writes
OOM_SCORE_ADJ_MAX to /proc/pid/oom_score_adj in between the two calls.
The compare_swap_oom_score_adj() will then incorrectly reset the old value
prior to the write of OOM_SCORE_ADJ_MAX.

To fix this, introduce a new oom_flags_t member in struct signal_struct
that will be used for per-thread oom killer flags.  KSM and swapoff can
now use a bit in this member to specify that threads should be killed
first in oom conditions without playing around with oom_score_adj.

This also allows the correct oom_score_adj to always be shown when reading
/proc/pid/oom_score.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: Anton Vorontsov <anton.vorontsov@linaro.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm, oom: change type of oom_score_adj to short
David Rientjes [Fri, 9 Nov 2012 03:04:33 +0000 (14:04 +1100)]
mm, oom: change type of oom_score_adj to short

The maximum oom_score_adj is 1000 and the minimum oom_score_adj is -1000,
so this range can be represented by the signed short type with no
functional change.  The extra space this frees up in struct signal_struct
will be used for per-thread oom kill flags in the next patch.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: Anton Vorontsov <anton.vorontsov@linaro.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: cleanup register_node()
Yasuaki Ishimatsu [Fri, 9 Nov 2012 03:04:33 +0000 (14:04 +1100)]
mm: cleanup register_node()

register_node() is defined as extern in include/linux/node.h.  But the
function is only called from register_one_node() in driver/base/node.c.

So the patch defines register_node() as static.

Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: fix slab.c kernel-doc warnings
Randy Dunlap [Fri, 9 Nov 2012 03:04:32 +0000 (14:04 +1100)]
mm: fix slab.c kernel-doc warnings

Fix new kernel-doc warnings in mm/slab.c:

Warning(mm/slab.c:2358): No description found for parameter 'cachep'
Warning(mm/slab.c:2358): Excess function parameter 'name' description in '__kmem_cache_create'
Warning(mm/slab.c:2358): Excess function parameter 'size' description in '__kmem_cache_create'
Warning(mm/slab.c:2358): Excess function parameter 'align' description in '__kmem_cache_create'
Warning(mm/slab.c:2358): Excess function parameter 'ctor' description in '__kmem_cache_create'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: add vm event counters for balloon pages compaction
Rafael Aquini [Fri, 9 Nov 2012 03:04:32 +0000 (14:04 +1100)]
mm: add vm event counters for balloon pages compaction

Introduce a new set of vm event counters to keep track of ballooned pages
compaction activity.

Signed-off-by: Rafael Aquini <aquini@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: introduce putback_movable_pages()
Rafael Aquini [Fri, 9 Nov 2012 03:04:32 +0000 (14:04 +1100)]
mm: introduce putback_movable_pages()

The patch "mm: introduce compaction and migration for virtio ballooned
pages" hacks around putback_lru_pages() in order to allow ballooned pages
to be re-inserted on balloon page list as if a ballooned page was like a
LRU page.

As ballooned pages are not legitimate LRU pages, this patch introduces
putback_movable_pages() to properly cope with cases where the isolated
pageset contains ballooned pages and LRU pages, thus fixing the mentioned
inelegant hack around putback_lru_pages().

Signed-off-by: Rafael Aquini <aquini@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agovirtio_balloon: introduce migration primitives to balloon pages
Rafael Aquini [Fri, 9 Nov 2012 03:04:32 +0000 (14:04 +1100)]
virtio_balloon: introduce migration primitives to balloon pages

Memory fragmentation introduced by ballooning might reduce significantly
the number of 2MB contiguous memory blocks that can be used within a
guest, thus imposing performance penalties associated with the reduced
number of transparent huge pages that could be used by the guest workload.

Besides making balloon pages movable at allocation time and introducing
the necessary primitives to perform balloon page migration/compaction,
this patch also introduces the following locking scheme, in order to
enhance the syncronization methods for accessing elements of struct
virtio_balloon, thus providing protection against concurrent access
introduced by parallel memory migration threads.

 - balloon_lock (mutex) : synchronizes the access demand to elements of
                          struct virtio_balloon and its queue operations;

Signed-off-by: Rafael Aquini <aquini@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: introduce compaction and migration for ballooned pages
Rafael Aquini [Fri, 9 Nov 2012 03:04:31 +0000 (14:04 +1100)]
mm: introduce compaction and migration for ballooned pages

Memory fragmentation introduced by ballooning might reduce significantly
the number of 2MB contiguous memory blocks that can be used within a
guest, thus imposing performance penalties associated with the reduced
number of transparent huge pages that could be used by the guest workload.

This patch introduces the helper functions as well as the necessary
changes to teach compaction and migration bits how to cope with pages
which are part of a guest memory balloon, in order to make them movable by
memory compaction procedures.

Signed-off-by: Rafael Aquini <aquini@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm-introduce-a-common-interface-for-balloon-pages-mobility-fix-fix
Rafael Aquini [Fri, 9 Nov 2012 03:04:31 +0000 (14:04 +1100)]
mm-introduce-a-common-interface-for-balloon-pages-mobility-fix-fix

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm-introduce-a-common-interface-for-balloon-pages-mobility-fix
Andrew Morton [Fri, 9 Nov 2012 03:04:31 +0000 (14:04 +1100)]
mm-introduce-a-common-interface-for-balloon-pages-mobility-fix

fix build with CONFIG_BALLOON_COMPACTION=n

Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Rafael Aquini <aquini@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: introduce a common interface for balloon pages mobility
Rafael Aquini [Fri, 9 Nov 2012 03:04:30 +0000 (14:04 +1100)]
mm: introduce a common interface for balloon pages mobility

Memory fragmentation introduced by ballooning might reduce significantly
the number of 2MB contiguous memory blocks that can be used within a
guest, thus imposing performance penalties associated with the reduced
number of transparent huge pages that could be used by the guest workload.

This patch introduces a common interface to help a balloon driver on
making its page set movable to compaction, and thus allowing the system to
better leverage the compation efforts on memory defragmentation.

Signed-off-by: Rafael Aquini <aquini@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: redefine address_space.assoc_mapping
Rafael Aquini [Fri, 9 Nov 2012 03:04:30 +0000 (14:04 +1100)]
mm: redefine address_space.assoc_mapping

Overhaul struct address_space.assoc_mapping renaming it to
address_space.private_data and its type is redefined to void*.  By this
approach we consistently name the .private_* elements from struct
address_space as well as allow extended usage for address_space
association with other data structures through ->private_data.

Also, all users of old ->assoc_mapping element are converted to reflect
its new name and type change.

Signed-off-by: Rafael Aquini <aquini@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm-adjust-address_space_operationsmigratepage-return-code-fix
Andrew Morton [Fri, 9 Nov 2012 03:04:30 +0000 (14:04 +1100)]
mm-adjust-address_space_operationsmigratepage-return-code-fix

Cc: Rafael Aquini <aquini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: adjust address_space_operations.migratepage() return code
Rafael Aquini [Fri, 9 Nov 2012 03:04:29 +0000 (14:04 +1100)]
mm: adjust address_space_operations.migratepage() return code

Memory fragmentation introduced by ballooning might reduce significantly
the number of 2MB contiguous memory blocks that can be used within a
guest, thus imposing performance penalties associated with the reduced
number of transparent huge pages that could be used by the guest workload.

This patchset follows the main idea discussed at 2012 LSFMMS session:
"Ballooning for transparent huge pages" -- http://lwn.net/Articles/490114/
to introduce the required changes to the virtio_balloon driver, as well as
the changes to the core compaction & migration bits, in order to make
those subsystems aware of ballooned pages and allow memory balloon pages
become movable within a guest, thus avoiding the aforementioned
fragmentation issue

Following are numbers that prove this patch benefits on allowing
compaction to be more effective at memory ballooned guests.

Results for STRESS-HIGHALLOC benchmark, from Mel Gorman's mmtests suite,
running on a 4gB RAM KVM guest which was ballooning 512mB RAM in 64mB
chunks, at every minute (inflating/deflating), while test was running:

===BEGIN stress-highalloc

STRESS-HIGHALLOC
                 highalloc-3.7     highalloc-3.7
                     rc4-clean         rc4-patch
Pass 1          55.00 ( 0.00%)    62.00 ( 7.00%)
Pass 2          54.00 ( 0.00%)    62.00 ( 8.00%)
while Rested    75.00 ( 0.00%)    80.00 ( 5.00%)

MMTests Statistics: duration
                 3.7         3.7
           rc4-clean   rc4-patch
User         1207.59     1207.46
System       1300.55     1299.61
Elapsed      2273.72     2157.06

MMTests Statistics: vmstat
                                3.7         3.7
                          rc4-clean   rc4-patch
Page Ins                    3581516     2374368
Page Outs                  11148692    10410332
Swap Ins                         80          47
Swap Outs                      3641         476
Direct pages scanned          37978       33826
Kswapd pages scanned        1828245     1342869
Kswapd pages reclaimed      1710236     1304099
Direct pages reclaimed        32207       31005
Kswapd efficiency               93%         97%
Kswapd velocity             804.077     622.546
Direct efficiency               84%         91%
Direct velocity              16.703      15.682
Percentage direct scans          2%          2%
Page writes by reclaim        79252        9704
Page writes file              75611        9228
Page writes anon               3641         476
Page reclaim immediate        16764       11014
Page rescued immediate            0           0
Slabs scanned               2171904     2152448
Direct inode steals             385        2261
Kswapd inode steals          659137      609670
Kswapd skipped wait               1          69
THP fault alloc                 546         631
THP collapse alloc              361         339
THP splits                      259         263
THP fault fallback               98          50
THP collapse fail                20          17
Compaction stalls               747         499
Compaction success              244         145
Compaction failures             503         354
Compaction pages moved       370888      474837
Compaction move failure       77378       65259

===END stress-highalloc

This patch:

Introduce MIGRATEPAGE_SUCCESS as the default return code for
address_space_operations.migratepage() method and documents the expected
return code for the same method in failure cases.

Signed-off-by: Rafael Aquini <aquini@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm, mempolicy: remove duplicate code
David Rientjes [Fri, 9 Nov 2012 03:04:29 +0000 (14:04 +1100)]
mm, mempolicy: remove duplicate code

Remove some duplicate code and simplify alloc_pages_vma().  No functional
change.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm/vmscan.c: try_to_freeze() returns boolean
Jeff Liu [Fri, 9 Nov 2012 03:04:29 +0000 (14:04 +1100)]
mm/vmscan.c: try_to_freeze() returns boolean

kswapd()->try_to_freeze() is defined to return a boolean, so it's better
to use a bool to hold its return value.

Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: use vm_unmapped_area() in hugetlbfs on tile architecture
Michel Lespinasse [Fri, 9 Nov 2012 03:04:28 +0000 (14:04 +1100)]
mm: use vm_unmapped_area() in hugetlbfs on tile architecture

Update the tile hugetlb_get_unmapped_area function to make use of
vm_unmapped_area() instead of implementing a brute force search.

Signed-off-by: Michel Lespinasse <walken@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: use vm_unmapped_area() on sparc32 architecture
Michel Lespinasse [Fri, 9 Nov 2012 03:04:28 +0000 (14:04 +1100)]
mm: use vm_unmapped_area() on sparc32 architecture

Update the sparc32 arch_get_unmapped_area function to make use of
vm_unmapped_area() instead of implementing a brute force search.

Signed-off-by: Michel Lespinasse <walken@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Acked-by: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: use vm_unmapped_area() in hugetlbfs on sparc64 architecture
Michel Lespinasse [Fri, 9 Nov 2012 03:04:28 +0000 (14:04 +1100)]
mm: use vm_unmapped_area() in hugetlbfs on sparc64 architecture

Update the sparc64 hugetlb_get_unmapped_area function to make use of
vm_unmapped_area() instead of implementing a brute force search.

Signed-off-by: Michel Lespinasse <walken@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm-use-vm_unmapped_area-on-sparc64-architecture-fix
Andrew Morton [Fri, 9 Nov 2012 03:04:27 +0000 (14:04 +1100)]
mm-use-vm_unmapped_area-on-sparc64-architecture-fix

remove now-unused COLOUR_ALIGN_DOWN()

Cc: "David S. Miller" <davem@davemloft.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Michel Lespinasse <walken@google.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: use vm_unmapped_area() on sparc64 architecture
Michel Lespinasse [Fri, 9 Nov 2012 03:04:27 +0000 (14:04 +1100)]
mm: use vm_unmapped_area() on sparc64 architecture

Update the sparc64 arch_get_unmapped_area[_topdown] functions to make use
of vm_unmapped_area() instead of implementing a brute force search.

Signed-off-by: Michel Lespinasse <walken@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm-use-vm_unmapped_area-on-sh-architecture-fix
Andrew Morton [Fri, 9 Nov 2012 03:04:27 +0000 (14:04 +1100)]
mm-use-vm_unmapped_area-on-sh-architecture-fix

remove now-unused COLOUR_ALIGN_DOWN()

Cc: "David S. Miller" <davem@davemloft.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Michel Lespinasse <walken@google.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
11 years agomm: use vm_unmapped_area() on sh architecture
Michel Lespinasse [Fri, 9 Nov 2012 03:04:26 +0000 (14:04 +1100)]
mm: use vm_unmapped_area() on sh architecture

Update the sh arch_get_unmapped_area[_topdown] functions to make use of
vm_unmapped_area() instead of implementing a brute force search.

Signed-off-by: Michel Lespinasse <walken@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>