Ed Cashin [Tue, 23 Oct 2012 02:50:43 +0000 (13:50 +1100)]
aoe: support larger I/O requests via aoe_maxsectors module param
The GPFS filesystem is an example of an aoe user that requires the aoe
driver to support I/O request sizes larger than the default. Most users
will not need large I/O request sizes, because they would need to be split
up into multiple AoE commands anyway.
Signed-off-by: Ed Cashin <ecashin@coraid.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Ed Cashin [Tue, 23 Oct 2012 02:50:43 +0000 (13:50 +1100)]
aoe: support the forgetting (flushing) of a user-specified AoE target
Users sometimes want to cause the aoe driver to forget a particular
previously discovered device when it is no longer online. The aoetools
provide an "aoe-flush" command that users run to perform this
administrative task. The changes below provide the support needed in the
driver.
Signed-off-by: Ed Cashin <ecashin@coraid.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Ed Cashin [Tue, 23 Oct 2012 02:50:43 +0000 (13:50 +1100)]
aoe: update cap on outstanding commands based on config query response
The ATA over Ethernet config query response contains a "buffer count"
field reflecting the AoE target's capacity to buffer incoming AoE
commands.
By taking the current value of this field into accound, we increase
performance throughput or avoid network congestion, when the value
has increased or decreased, respectively.
Signed-off-by: Ed Cashin <ecashin@coraid.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Ed Cashin [Tue, 23 Oct 2012 02:50:41 +0000 (13:50 +1100)]
Documentation/sparse.txt: document context annotations for lock checking
The context feature of sparse is used with the Linux kernel sources to
check for imbalanced uses of locks. Document the annotations defined in
include/linux/compiler.h that tell sparse what to expect when a lock is
held on function entry, exit, or both.
Signed-off-by: Ed Cashin <ecashin@coraid.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Josh Triplett [Tue, 23 Oct 2012 02:50:41 +0000 (13:50 +1100)]
linux/compiler.h: add __must_hold macro for functions called with a lock held
linux/compiler.h has macros to denote functions that acquire or release
locks, but not to denote functions called with a lock held that return
with the lock still held. Add a __must_hold macro to cover that case.
Signed-off-by: Josh Triplett <josh@joshtriplett.org> Reported-by: Ed Cashin <ecashin@coraid.com> Tested-by: Ed Cashin <ecashin@coraid.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Manfred Spraul [Tue, 23 Oct 2012 02:50:41 +0000 (13:50 +1100)]
ipc/sem.c: alternatives to preempt_disable()
ipc/sem.c uses a custom wakeup scheme that relies on preempt_disable().
On -RT, this causes increased latencies and debug warnings.
The patch adds two additional schemes:
- one built around a completion - could be better for -RT kernels
- one built around a spinlock - unfortunately it's broken
- and the current one
My preferred solution would be the spinlock implementation: RT would use
premptible spinlocks, mainline normal spinlocks. Thus both get the
optimal implementation without any special code in ipc/sem.c.
Unfortunately, I don't see how it could be fixed.
Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Mike Galbraith <efault@gmx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cyrill Gorcunov [Tue, 23 Oct 2012 02:50:41 +0000 (13:50 +1100)]
procfs: add VmFlags field in smaps output
During c/r sessions we've found that there is no way at the moment to
fetch some VMA associated flags, such as mlock() and madvise().
This leads us to a problem -- we don't know if we should call for mlock()
and/or madvise() after restore on the vma area we're bringing back to
life.
This patch intorduces a new field into "smaps" output called VmFlags,
where all set flags associated with the particular VMA is shown as two
letter mnemonics.
[ Strictly speaking for c/r we only need mlock/madvise bits but it has been
said that providing just a few flags looks somehow inconsistent. So all
flags are here now. ]
This feature is made available on CONFIG_CHECKPOINT_RESTORE=n kernels, as
other applications may start to use these fields.
The data is encoded in a somewhat awkward two letters mnemonic form, to
encourage userspace to be prepared for fields being added or removed in
the future.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
I suggest to hide non-existent capabilities. Here is two reasons.
* It's logically and easier for using.
* It helps to checkpoint-restore capabilities of tasks, because tasks
can be restored on another kernel, where CAP_LAST_CAP is bigger.
Signed-off-by: Andrew Vagin <avagin@openvz.org> Cc: Andrew G. Morgan <morgan@kernel.org> Reviewed-by: Serge E. Hallyn <serge.hallyn@canonical.com> Cc: Pavel Emelyanov <xemul@parallels.com> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Eldad Zack [Tue, 23 Oct 2012 02:50:40 +0000 (13:50 +1100)]
simple_strto*: annotate function as obsolete
Update the documentation for simple_strto* to reflect that it has been
obsoleted and advise the usage of kstrto*.
Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Joe Perches <joe@perches.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Rob Landley <rob@landley.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Eldad Zack [Tue, 23 Oct 2012 02:50:40 +0000 (13:50 +1100)]
kstrto*: add documentation
As Bruce Fields pointed out, kstrto* is currently lacking kerneldoc
comments. This patch adds kerneldoc comments to common variants of
kstrto*: kstrto(u)l, kstrto(u)ll and kstrto(u)int.
Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Joe Perches <joe@perches.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Rob Landley <rob@landley.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Namjae Jeon [Tue, 23 Oct 2012 02:50:39 +0000 (13:50 +1100)]
fat (exportfs): rebuild directory-inode if fat_dget() fails
This patch enables rebuilding of directory inodes which are not present in
the cache.This is done by traversing the disk clusters to find the
directory entry of the parent directory and using its i_pos to build the
inode.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Ravishankar N <ravi.n1@samsung.com> Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Andrew Morton [Tue, 23 Oct 2012 02:50:39 +0000 (13:50 +1100)]
fat-exportfs-rebuild-inode-if-ilookup-fails-fix
fix warnings/types
fs/fat/nfs.c: In function 'fat_nfs_get_inode':
fs/fat/nfs.c:68: warning: passing argument 3 of 'fat_get_blknr_offset' from incompatible pointer type
fs/fat/fat.h:218: note: expected 'sector_t *' but argument is of type 'loff_t *'
fs/fat/inode.c: In function '__fat_write_inode':
fs/fat/inode.c:630: warning: passing argument 3 of 'fat_get_blknr_offset' from incompatible pointer type
fs/fat/fat.h:218: note: expected 'sector_t *' but argument is of type 'loff_t *'
Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Amit Sahrawat <a.sahrawat@samsung.com> Cc: Namjae Jeon <namjae.jeon@samsung.com> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: Ravishankar N <ravi.n1@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Namjae Jeon [Tue, 23 Oct 2012 02:50:38 +0000 (13:50 +1100)]
fat (exportfs): rebuild inode if ilookup() fails
Assign i_pos to kstat->ino and re-introduce fat_encode_fh() and include
i_pos value in the file handle.Use the i_pos value to find the directory
entry of the inode and subsequently rebuild the inode if the cache lookups
fail.
Since this involves accessing the FAT media, it is better to do this only
if the 'nfs' mount option is enabled with nostale_ro. Also introduce a
helper fat_get_blknr_offset() for use in __fat_write_inode() and
fat_nfs_get_inode()
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Ravishankar N <ravi.n1@samsung.com> Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Namjae Jeon [Tue, 23 Oct 2012 02:50:38 +0000 (13:50 +1100)]
fat: modify nfs mount option
This patchset eliminates the client side ESTALE errors when a FAT
partition exported over NFS has its dentries evicted from the cache.
One of the reasons for this error is lack of permanent inode numbers on
FAT which makes it difficult to construct persistent file handles. This
can be overcome by using fat_encode_fh() that include i_pos in file
handle.
Once the i_pos is available, it is only a matter of reading the directory
entries from the disk clusters to locate the matching entry and rebuild
the corresponding inode.
We reached the conclusion support stable inode's read-only export first
after discussing with OGAWA and Bruce. And will make it writable with
some operation(unlink and rename) limitation next time.
This patch:
Provide two possible values 'stale_rw' and 'nostale_ro' for the -o nfs
mount option. The first one allows all file operations but does not
reduce ESTALE errors on memory constrained systems. The second one
eliminates ESTALE errors but mounts the filesystem as read-only. Not
specifying a value defaults to 'stale_rw'.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Ravishankar N <ravi.n1@samsung.com> Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
hfsplus: code style fixes - reworked support of extended attributes
This patch fixes code style issues:
1. Rephrase comment.
2. Fix multiline comment style.
3. The hfsplus_alloc_attr_entry() was corrected.
4. The hfsplus_unistr and hfsplus_attr_unistr structures were declared
independently.
Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
hfsplus: add on-disk layout declarations related to attributes tree
Current mainline implementation of hfsplus file system driver treats as
extended attributes only two fields (fdType and fdCreator) of user_info
field in file description record (struct hfsplus_cat_file). It is
possible to get or set only these two fields as extended attributes. But
HFS+ treats as com.apple.FinderInfo extended attribute an union of
user_info and finder_info fields as for file (struct hfsplus_cat_file) as
for folder (struct hfsplus_cat_folder). Moreover, current mainline
implementation of hfsplus file system driver doesn't support special
metadata file - attributes tree.
Mac OS X 10.4 and later support extended attributes by making use of the
HFS+ filesystem Attributes file B*-tree feature which allows for named
forks. Mac OS X supports only inline extended attributes, limiting their
size to 3802 bytes. Any regular file may have a list of extended
attributes. HFS+ supports an arbitrary number of named forks. Each
attribute is denoted by a name and the associated data. The name is a
null-terminated Unicode string. It is possible to list, to get, to set,
and to remove extended attributes from files or directories.
It exists some peculiarity during getting of extended attributes list by
means of getfattr utility. The getfattr utility expects prefix "user."
before any extended attribute's name. So, it ignores any names that don't
contained such prefix. Such behavior of getfattr utility results in
unexpected empty output of extended attributes list even in the case when
file (or folder) contains extended attributes. It needs to use empty
string as regular expression pattern for names matching (getfattr
--match="").
For support of extended attributes in HFS+:
1. It was added necessary on-disk layout declarations related to
Attributes tree into hfsplus_raw.h file.
2. It was added attributes.c file with implementation of functionality
of manipulation by records in Attributes tree.
3. It was reworked hfsplus_listxattr, hfsplus_getxattr,
hfsplus_setxattr functions in ioctl.c. Moreover, it was added
hfsplus_removexattr method.
This patch:
Add all neccessary on-disk layout declarations related to attributes
file.
Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com> Reported-by: Hin-Tak Leung <htl10@users.sourceforge.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Cc: Jan Kara <jack@suse.cz> Tested-by: Hin-Tak Leung <htl10@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Vaibhav Hiremath [Tue, 23 Oct 2012 02:50:36 +0000 (13:50 +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>
Afzal Mohammed [Tue, 23 Oct 2012 02:50:36 +0000 (13:50 +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>
Afzal Mohammed [Tue, 23 Oct 2012 02:50:35 +0000 (13:50 +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>
Afzal Mohammed [Tue, 23 Oct 2012 02:50:35 +0000 (13:50 +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>
Afzal Mohammed [Tue, 23 Oct 2012 02:50:35 +0000 (13:50 +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>
Some comment styles in net and drivers/net are flagged inappropriately.
Avoid proclaiming inline comments like:
int a = b; /* some comment */
and block comments like:
/*********************
* some comment
********************/
are defective.
Tested with
$ cat drivers/net/t.c
/* foo */
/*
* foo
*/
/* foo
*/
/* foo
* bar */
/****************************
* some long block comment
***************************/
struct foo {
int bar; /* another test */
};
$
Signed-off-by: Joe Perches <joe@perches.com> Reported-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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>
Andy Shevchenko [Tue, 23 Oct 2012 02:50:32 +0000 (13:50 +1100)]
staging: rts_pstor: use kbasename()
The custom filename function mostly repeats the kernel's kbasename. This patch
simplifies it. The updated filename() will not check for the '\' in the
filenames. It seems redundant in Linux. The __FILE__ macro always defined if
we compile an existing file. Thus, NULL check is not needed there as well.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: YAMANE Toshiaki <yamanetoshi@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Andy Shevchenko [Tue, 23 Oct 2012 02:50:31 +0000 (13:50 +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>
Andy Shevchenko [Tue, 23 Oct 2012 02:50:31 +0000 (13:50 +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>
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>
Kim, Milo [Tue, 23 Oct 2012 02:50:30 +0000 (13:50 +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>
Jingoo Han [Tue, 23 Oct 2012 02:50:30 +0000 (13:50 +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>
Jingoo Han [Tue, 23 Oct 2012 02:50:29 +0000 (13:50 +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>
Jingoo Han [Tue, 23 Oct 2012 02:50:27 +0000 (13:50 +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>
Jingoo Han [Tue, 23 Oct 2012 02:50:26 +0000 (13:50 +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>
Jingoo Han [Tue, 23 Oct 2012 02:50:26 +0000 (13:50 +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>
Jingoo Han [Tue, 23 Oct 2012 02:50:24 +0000 (13:50 +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>
Jean Delvare [Tue, 23 Oct 2012 02:50:23 +0000 (13:50 +1100)]
MAINTAINERS: NETWORKING DRIVERS matches too much
File pattern include/linux/*device.h matches too much, including
completely unrelated files. Replace it with an explicit list of network
device-related header files.
Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Joe Perches <joe@perches.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Joe Perches [Tue, 23 Oct 2012 02:50:19 +0000 (13:50 +1100)]
printk: rename log_<foo> variables and functions
Make these generic names more specific to the printk
subsystem and allow these variables and functions to
become non-static.
Rename log_text to printk_log_text.
Rename log_dict to printk_log_dict.
Rename log_from_idx to printk_log_from_idx.
Rename log_next to printk_log_next.
Rename log_store to printk_log_store.
Signed-off-by: Joe Perches <joe@perches.com> Cc: Kay Sievers <kay@vrfy.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Joe Perches [Tue, 23 Oct 2012 02:50:18 +0000 (13:50 +1100)]
printk: rename log_first and log_next variables
Make these generic names more specific to the printk
subsystem and allow these variables to become non-static.
Rename log_first_idx to printk_log_first_idx.
Rename log_first_seq to printk_log_first_seq.
Rename log_next_idx to printk_log_next_idx.
Rename log_next_seq to printk_log_next_seq.
Signed-off-by: Joe Perches <joe@perches.com> Cc: Kay Sievers <kay@vrfy.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Joe Perches [Tue, 23 Oct 2012 02:50:17 +0000 (13:50 +1100)]
printk: move braille console support into separate braille.[ch] files
Create files with prototypes and static inlines for braille
support. Make braille_console functions return 1 on success.
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by: Joe Perches <joe@perches.com> Cc: Kay Sievers <kay@vrfy.org> Acked-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Leach <matthew@mattleach.net>
ERROR: space required after that ',' (ctx:VxV)
#25: FILE: include/linux/init.h:189:
+#define __define_initcall(fn,id) \
^
ERROR: space required after that ',' (ctx:VxV)
#36: FILE: include/linux/init.h:198:
+#define early_initcall(fn) __define_initcall(fn,early)
^
ERROR: space required after that ',' (ctx:VxV)
#45: FILE: include/linux/init.h:207:
+#define pure_initcall(fn) __define_initcall(fn,0)
^
ERROR: space required after that ',' (ctx:VxV)
#62: FILE: include/linux/init.h:209:
+#define core_initcall(fn) __define_initcall(fn,1)
^
ERROR: space required after that ',' (ctx:VxV)
#63: FILE: include/linux/init.h:210:
+#define core_initcall_sync(fn) __define_initcall(fn,1s)
^
ERROR: space required after that ',' (ctx:VxV)
#64: FILE: include/linux/init.h:211:
+#define postcore_initcall(fn) __define_initcall(fn,2)
^
ERROR: space required after that ',' (ctx:VxV)
#65: FILE: include/linux/init.h:212:
+#define postcore_initcall_sync(fn) __define_initcall(fn,2s)
^
ERROR: space required after that ',' (ctx:VxV)
#66: FILE: include/linux/init.h:213:
+#define arch_initcall(fn) __define_initcall(fn,3)
^
ERROR: space required after that ',' (ctx:VxV)
#67: FILE: include/linux/init.h:214:
+#define arch_initcall_sync(fn) __define_initcall(fn,3s)
^
ERROR: space required after that ',' (ctx:VxV)
#68: FILE: include/linux/init.h:215:
+#define subsys_initcall(fn) __define_initcall(fn,4)
^
ERROR: space required after that ',' (ctx:VxV)
#69: FILE: include/linux/init.h:216:
+#define subsys_initcall_sync(fn) __define_initcall(fn,4s)
^
ERROR: space required after that ',' (ctx:VxV)
#70: FILE: include/linux/init.h:217:
+#define fs_initcall(fn) __define_initcall(fn,5)
^
ERROR: space required after that ',' (ctx:VxV)
#71: FILE: include/linux/init.h:218:
+#define fs_initcall_sync(fn) __define_initcall(fn,5s)
^
ERROR: space required after that ',' (ctx:VxV)
#72: FILE: include/linux/init.h:219:
+#define rootfs_initcall(fn) __define_initcall(fn,rootfs)
^
ERROR: space required after that ',' (ctx:VxV)
#73: FILE: include/linux/init.h:220:
+#define device_initcall(fn) __define_initcall(fn,6)
^
ERROR: space required after that ',' (ctx:VxV)
#74: FILE: include/linux/init.h:221:
+#define device_initcall_sync(fn) __define_initcall(fn,6s)
^
ERROR: space required after that ',' (ctx:VxV)
#75: FILE: include/linux/init.h:222:
+#define late_initcall(fn) __define_initcall(fn,7)
^
ERROR: space required after that ',' (ctx:VxV)
#76: FILE: include/linux/init.h:223:
+#define late_initcall_sync(fn) __define_initcall(fn,7s)
^
total: 18 errors, 0 warnings, 58 lines checked
./patches/init-use-the-stringify-operator-for-the-__define_initcall-macro.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: Matthew Leach <matthew@mattleach.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Matthew Leach [Tue, 23 Oct 2012 02:50:16 +0000 (13:50 +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> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wanpeng Li [Tue, 23 Oct 2012 02:50:15 +0000 (13:50 +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>
Shaohua Li [Tue, 23 Oct 2012 02:50:15 +0000 (13:50 +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.
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>
Glauber Costa [Tue, 23 Oct 2012 02:50:14 +0000 (13:50 +1100)]
slab: ignore internal flags in cache creation
Some flags are used internally by the allocators for management purposes.
One example of that is the CFLGS_OFF_SLAB flag that slab uses to mark that
the metadata for that cache is stored outside of the slab.
No cache should ever pass those as a creation flags. We can just ignore
this bit if it happens to be passed (such as when duplicating a cache in
the kmem memcg patches).
Because such flags can vary from allocator to allocator, we allow them to
make their own decisions on that, defining SLAB_AVAILABLE_FLAGS with all
flags that are valid at creation time. Allocators that doesn't have any
specific flag requirement should define that to mean all flags.
Common code will mask out all flags not belonging to that set.
Signed-off-by: Glauber Costa <glommer@parallels.com> Acked-by: Christoph Lameter <cl@linux.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Tue, 23 Oct 2012 02:50:14 +0000 (13:50 +1100)]
memory-hotplug: allocate zone's pcp before onlining pages
We use __free_page() to put a page to buddy system when onlining pages.
__free_page() will store NR_FREE_PAGES in zone's pcp.vm_stat_diff, so we
should allocate zone's pcp before onlining pages, otherwise we will lose
some free pages.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Len Brown <len.brown@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Christoph Lameter <cl@linux.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Tue, 23 Oct 2012 02:50:14 +0000 (13:50 +1100)]
memory-hotplug: fix NR_FREE_PAGES mismatch
NR_FREE_PAGES will be wrong after offlining pages. We add/dec
NR_FREE_PAGES like this now:
1. move all pages in buddy system to MIGRATE_ISOLATE, and dec NR_FREE_PAGES
2. don't add NR_FREE_PAGES when it is freed and the migratetype is
MIGRATE_ISOLATE
3. dec NR_FREE_PAGES when offlining isolated pages.
4. add NR_FREE_PAGES when undoing isolate pages.
When we come to step 3, all pages are in MIGRATE_ISOLATE list, and
NR_FREE_PAGES are right. When we come to step4, all pages are not in
buddy system, so we don't change NR_FREE_PAGES in this step, but we change
NR_FREE_PAGES in step3. So NR_FREE_PAGES is wrong after offlining pages.
So there is no need to change NR_FREE_PAGES in step3.
This patch also fixs a problem in step2: if the migratetype is
MIGRATE_ISOLATE, we should not add NR_FRR_PAGES when we remove pages from
pcppages.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Len Brown <len.brown@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Christoph Lameter <cl@linux.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Tue, 23 Oct 2012 02:50:14 +0000 (13:50 +1100)]
memory-hotplug: auto offline page_cgroup when onlining memory block failed
When a memory block is onlined, we will try allocate memory on that node
to store page_cgroup. If onlining the memory block failed, we don't
offline the page cgroup, and we have no chance to offline this page cgroup
unless the memory block is onlined successfully again. It will cause that
we can't hot-remove the memory device on that node, because some memory is
used to store page cgroup. If onlining the memory block is failed, there
is no need to stort page cgroup for this memory. So auto offline
page_cgroup when onlining memory block failed.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Len Brown <len.brown@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Christoph Lameter <cl@linux.com> Cc: Minchan Kim <minchan.kim@gmail.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Tue, 23 Oct 2012 02:50:13 +0000 (13:50 +1100)]
memory-hotplug: skip HWPoisoned page when offlining pages
hwpoisoned may be set when we offline a page by the sysfs interface
/sys/devices/system/memory/soft_offline_page or
/sys/devices/system/memory/hard_offline_page. If we don't clear
this flag when onlining pages, this page can't be freed, and will
not in free list. So we can't offline these pages again. So we
should skip such page when offlining pages.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Len Brown <len.brown@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Christoph Lameter <cl@linux.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
projects / karo-tx-linux.git / log