Peter Zijlstra [Mon, 6 Apr 2009 09:45:12 +0000 (11:45 +0200)]
perf_counter: remove rq->lock usage
Now that all the task runtime clock users are gone, remove the ugly
rq->lock usage from perf counters, which solves the nasty deadlock
seen when a software task clock counter was read from an NMI overflow
context.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090406094518.531137582@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Mon, 6 Apr 2009 09:45:09 +0000 (11:45 +0200)]
perf_counter: change event definition
Currently the definition of an event is slightly ambiguous. We have
wakeup events, for poll() and SIGIO, which are either generated
when a record crosses a page boundary (hw_events.wakeup_events == 0),
or every wakeup_events new records.
Now a record can be either a counter overflow record, or a number of
different things, like the mmap PROT_EXEC region notifications.
Then there is the PERF_COUNTER_IOC_REFRESH event limit, which only
considers counter overflows.
This patch changes then wakeup_events and SIGIO notification to only
consider overflow events. Furthermore it changes the SIGIO notification
to report SIGHUP when the event limit is reached and the counter will
be disabled.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090406094518.266679874@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Mon, 6 Apr 2009 09:45:04 +0000 (11:45 +0200)]
perf_counter: theres more to overflow than writing events
Prepare for more generic overflow handling. The new perf_counter_overflow()
method will handle the generic bits of the counter overflow, and can return
a !0 return value, in which case the counter should be (soft) disabled, so
that it won't count until it's properly disabled.
XXX: do powerpc and swcounter
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090406094517.812109629@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Mon, 6 Apr 2009 09:44:59 +0000 (11:44 +0200)]
perf_counter: update mmap() counter read, take 2
Update the userspace read method.
Paul noted that:
- userspace cannot observe ->lock & 1 on the same cpu.
- we need a barrier() between reading ->lock and ->index
to ensure we read them in that prticular order.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090406094517.368446033@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
NFS: Fix a double free in nfs_parse_mount_options()
Due to an apparent typo, commit a67d18f89f5782806135aad4ee012ff78d45aae7
(NFS: load the rpc/rdma transport module automatically) lead to the
'proto=' mount option doing a double free, while Opt_mountproto leaks a
string.
ext3: make default data ordering mode configurable
This makes the defautl ext3 data ordering mode (when no explicit
ordering is set) configurable, so as to allow people to default to
'data=writeback' and get the resulting latency improvements.
This is a non-issue if a filesystem has been explicitly set to some
ordering (with 'tune2fs').
* git://git.infradead.org/mtd-2.6: (53 commits)
[MTD] struct device - replace bus_id with dev_name(), dev_set_name()
[MTD] [NOR] Fixup for Numonyx M29W128 chips
[MTD] mtdpart: Make ecc_stats more realistic.
powerpc/85xx: TQM8548: Update DTS file for multi-chip support
powerpc: NAND: FSL UPM: document new bindings
[MTD] [NAND] FSL-UPM: Add wait flags to support board/chip specific delays
[MTD] [NAND] FSL-UPM: add multi chip support
[MTD] [NOR] Add device parent info to physmap_of
[MTD] [NAND] Add support for NAND on the Socrates board
[MTD] [NAND] Add support for 4KiB pages.
[MTD] sysfs support should not depend on CONFIG_PROC_FS
[MTD] [NAND] Add parent info for CAFÉ controller
[MTD] support driver model updates
[MTD] driver model updates (part 2)
[MTD] driver model updates
[MTD] [NAND] move gen_nand's probe function to .devinit.text
[MTD] [MAPS] move sa1100 flash's probe function to .devinit.text
[MTD] fix use after free in register_mtd_blktrans
[MTD] [MAPS] Drop now unused sharpsl-flash map
[MTD] ofpart: Check name property to determine partition nodes.
...
Manually fix trivial conflict in drivers/mtd/maps/Makefile
Alan Cox [Mon, 6 Apr 2009 16:35:25 +0000 (17:35 +0100)]
symbol: Remove various bits of left over junk
There are various bits of code here that are unfinished and instead of
being harmless either confuse or spew stuff into the logs at higher than
debug level. They can and should go away.
Also remove the bogus use of tty->lowlatency. We fixed the need for this hack
long ago (with the flip buffer rewrite) but people keep copying it into drivers.
Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In file included from drivers/serial/mux.c:37:
include/linux/serial_core.h: In function 'uart_handle_sysrq_char':
include/linux/serial_core.h:467: error: 'struct uart_port' has no member named 'sysrq'
include/linux/serial_core.h:468: error: 'struct uart_port' has no member named 'sysrq'
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mxser: remove tty_port_tty_get from mxser_check_modem_status
mxser_check_modem_status is called with tty parameter, so the
reference should be increased by callers already -- for ioctl
syscall it is held whole time gap since open to close, for
interrupt, the reference count is increased in the irq handler.
There is no tty_kref_put in that function, so this also fixes
a refcounting bug.
riscom8: Auto-load riscom8 module when device opened.
The riscom8 module is missing the char-major-48-* alias that would cause
it to be auto-loaded when a device of that type is opened. This patch
adds the alias.
Signed-off-by: Scott James Remnant <scott@canonical.com> Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The cdc_acm module is missing the char-major-166-* alias that would
cause it to be auto-loaded when a device of that type is opened. This
patch adds the alias.
Signed-off-by: Scott James Remnant <scott@canonical.com> Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
specialix: Auto-load specialix module when device opened.
The specialix module is missing the char-major-75-* alias that would
cause it to be auto-loaded when a device of that type is opened. This
patch adds the alias.
Signed-off-by: Scott James Remnant <scott@canonical.com> Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
cyclades: Auto-load cyclades module when device opened.
The cyclades module is missing the char-major-19-* alias that would
cause it to be auto-loaded when a device of that type is opened. This
patch adds the alias.
Signed-off-by: Scott James Remnant <scott@canonical.com> Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
applicom: Auto-load applicom module when device opened.
The applicom module is missing the char-major-10-157 alias that would
cause it to be auto-loaded when a device of that type is opened. This
patch adds the alias.
Signed-off-by: Scott James Remnant <scott@canonical.com> Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8250_pci: add support for National Instruments 843x RS232 devices
This implements basic support for all 843x RS232 devices, but does not
add DMA support. This means that sustained data transfers at high baud
rates may not be possible on multiple ports simultaneously.
Matthew Garrett [Mon, 6 Apr 2009 16:32:01 +0000 (17:32 +0100)]
serial: Update PNP IDs
Add new Wacom device IDs to the 8250_pnp serial driver, to support
autoconfig on some newer tablet PCs. Also add a comment to clarify that
the FUJ02E6 device is a custom protocol, not a Wacom tablet.
Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@etchedpixels.co.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Mon, 6 Apr 2009 14:47:25 +0000 (15:47 +0100)]
Make CONFIG_SLOW_WORK an automatic rather than manual config option
Make CONFIG_SLOW_WORK an automatic rather than manual config option so that
people configuring their kernels don't have to make the choice. It can be
selected automatically by those things that require it (such as FS-Cache).
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Jeff Garzik <jgarzik@redhat.com> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
...
AS arch/frv/mm/tlb-miss.o
In file included from
arch/frv/mm/tlb-miss.S:13:
...
Assembler messages:
include/asm-generic/ioctl.h:73:
Error: unrecognized instruction `extern unsigned int __invalid_size_argument_for_IO...'
...
Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix this build error:
drivers/pci/intr_remapping.c: In function 'ir_parse_ioapic_scope':
drivers/pci/intr_remapping.c:617: error: invalid use of undefined type
'struct acpi_dmar_hardware_unit'
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
percpu: __percpu_depopulate_mask can take a const mask
This eliminates a compiler warning:
mm/allocpercpu.c: In function 'free_percpu':
mm/allocpercpu.c:146: warning: passing argument 2 of '__percpu_depopulate_mask' discards qualifiers from pointer target type
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Some of the limit constants are used only depending on some complex
configuration dependencies, yet it's not worth making the simple
variables depend on those configuration details. Just mark them as
perhaps not being unused, and avoid the warning.
Merge branch 'kmemtrace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'kmemtrace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
kmemtrace: trace kfree() calls with NULL or zero-length objects
kmemtrace: small cleanups
kmemtrace: restore original tracing data binary format, improve ABI
kmemtrace: kmemtrace_alloc() must fill type_id
kmemtrace: use tracepoints
kmemtrace, rcu: don't include unnecessary headers, allow kmemtrace w/ tracepoints
kmemtrace, rcu: fix rcupreempt.c data structure dependencies
kmemtrace, rcu: fix rcu_tree_trace.c data structure dependencies
kmemtrace, rcu: fix linux/rcutree.h and linux/rcuclassic.h dependencies
kmemtrace, mm: fix slab.h dependency problem in mm/failslab.c
kmemtrace, kbuild: fix slab.h dependency problem in lib/decompress_unlzma.c
kmemtrace, kbuild: fix slab.h dependency problem in lib/decompress_bunzip2.c
kmemtrace, kbuild: fix slab.h dependency problem in lib/decompress_inflate.c
kmemtrace, squashfs: fix slab.h dependency problem in squasfs
kmemtrace, befs: fix slab.h dependency problem
kmemtrace, security: fix linux/key.h header file dependencies
kmemtrace, fs: fix linux/fdtable.h header file dependencies
kmemtrace, fs: uninline simple_transaction_set()
kmemtrace, fs, security: move alloc_secdata() and free_secdata() to linux/security.h
Merge branch 'for-2.6.30' of git://linux-nfs.org/~bfields/linux
* 'for-2.6.30' of git://linux-nfs.org/~bfields/linux: (81 commits)
nfsd41: define nfsd4_set_statp as noop for !CONFIG_NFSD_V4
nfsd41: define NFSD_DRC_SIZE_SHIFT in set_max_drc
nfsd41: Documentation/filesystems/nfs41-server.txt
nfsd41: CREATE_EXCLUSIVE4_1
nfsd41: SUPPATTR_EXCLCREAT attribute
nfsd41: support for 3-word long attribute bitmask
nfsd: dynamically skip encoded fattr bitmap in _nfsd4_verify
nfsd41: pass writable attrs mask to nfsd4_decode_fattr
nfsd41: provide support for minor version 1 at rpc level
nfsd41: control nfsv4.1 svc via /proc/fs/nfsd/versions
nfsd41: add OPEN4_SHARE_ACCESS_WANT nfs4_stateid bmap
nfsd41: access_valid
nfsd41: clientid handling
nfsd41: check encode size for sessions maxresponse cached
nfsd41: stateid handling
nfsd: pass nfsd4_compound_state* to nfs4_preprocess_{state,seq}id_op
nfsd41: destroy_session operation
nfsd41: non-page DRC for solo sequence responses
nfsd41: Add a create session replay cache
nfsd41: create_session operation
...
Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight
* 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight:
backlight: Adds HP Jornada 700 series backlight driver
backlight: Add HP Jornada 700 series LCD driver
backlight: fix pwm_bl.c when multiple PWM backlights exist
backlight: mbp_nvidia_bl - Add a debug switch
backlight: Add support for MacBook 5, MacBook Air 2, and MacBook Pro 5
Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds
* 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds:
leds: introduce lp5521 led driver
leds: just ignore invalid GPIOs in leds-gpio
leds: Fix &&/|| confusion in leds-pca9532.c
leds: move h1940-leds's probe function to .devinit.text
leds: remove an unnecessary "goto" on drivers/leds/leds-s3c24.c
leds: add BD2802GU LED driver
leds: remove experimental flag from leds-clevo-mail
leds: Prevent multiple LED triggers with the same name
leds: Add gpio-led trigger
leds: Add rb532 LED driver for the User LED
leds: Add suspend/resume state flags to leds-gpio
leds: simple driver for pwm driven LEDs
leds: Fix leds-gpio driver multiple module_init/exit usage
leds: Add dac124s085 driver
leds: allow led-drivers to use a variable range of brightness values
leds: Add openfirmware platform device support
Fixes the following compiler error:
fs/nfsd/nfssvc.c: In function 'set_max_drc':
fs/nfsd/nfssvc.c:240: error: 'NFSD_DRC_SIZE_SHIFT' undeclared
CONFIG_NFSD_V4 is not set
Reported-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Jean Delvare [Mon, 6 Apr 2009 16:12:24 +0000 (18:12 +0200)]
i2c: Deprecate client_register and client_unregister methods
The new i2c binding model makes the client_register and
client_unregister methods of struct i2c_adapter useless, so we can
remove them with the rest of the legacy model.
Eric Miao [Tue, 10 Feb 2009 05:30:37 +0000 (13:30 +0800)]
backlight: fix pwm_bl.c when multiple PWM backlights exist
When multiple PWMs are used as backlights, the current code uses
pdev->name as the backlight name when registering, which will be
conflicting, use dev_name() instead.
Signed-off-by: Peter Edwards <sweetlilmre@gmail.com> Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Mario Schwalbe [Sun, 11 Jan 2009 00:19:31 +0000 (00:19 +0000)]
backlight: mbp_nvidia_bl - Add a debug switch
This patch adds a debug switch to enable (little) diagnostic
output, to help to trace down the remaining problems.
Signed-off-by: Mario Schwalbe <schwalbe@inf.tu-dresden.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Mario Schwalbe [Sun, 11 Jan 2009 00:11:34 +0000 (00:11 +0000)]
backlight: Add support for MacBook 5, MacBook Air 2, and MacBook Pro 5
This patch adds support for the new Apple models incorporating an Nvidia
chipset. Apple still uses the same protocol as on older models, but the
registers moved to a different address. To do this, two sets of functions
are added for the Intel/Nvidia chipset models and passed by the DMI_MATCH
function.
The initial code has been contributed by Hu Gang <hugang@soulinfo.com>.
The driver is known to work on MacBook Pro 3, MacBook Pro 4 and MacBook
Pro 5.
Its known to work with limitations on MacBook 5 / MacBook Air 2. Changing
brightness within X doesn't work, if using Nvidia's proprietary graphics
driver with no known fix at present. Changing brightness on a text console
or using the open-source driver does work.
MacBook Pro 5 has a known bug where the initial brightness after bootup is
the last recently used brightness (in Mac OSX), while the firmware reports
maximum. Impossible to fix.
[akpm@linux-foundation.org: build fix]
[rpurdie@linux.intel.com: Rebased the patch against latest git] Signed-off-by: Mario Schwalbe <schwalbe@inf.tu-dresden.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
David Brownell [Fri, 6 Mar 2009 00:46:44 +0000 (16:46 -0800)]
leds: just ignore invalid GPIOs in leds-gpio
Sometimes it's awkward to make sure that the array in the
platform_data handed to the leds-gpio driver has only valid
data ... some leds may not be always available, and coping
with that currently requires patching or rebuilding the array.
This patch fixes that by making it be OK to pass an invalid
GPIO (such as "-EINVAL") ... such table entries are skipped.
[rpurdie@linux.intel.com: adjusted to apply against other led tree changes] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Tested-by: Diego Dompe <diego.dompe@ridgerun.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Uwe Kleine-König [Fri, 27 Mar 2009 23:26:38 +0000 (00:26 +0100)]
leds: move h1940-leds's probe function to .devinit.text
A pointer to h1940leds_probe is passed to the core via
platform_driver_register and so the function must not disappear when the
.init sections are discarded. Otherwise (if also having HOTPLUG=y)
unbinding and binding a device to the driver via sysfs will result in an
oops as does a device being registered late.
An alternative to this patch is using platform_driver_probe instead of
platform_driver_register plus removing the pointer to the probe function
from the struct platform_driver.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Kim Kyuwon [Wed, 4 Mar 2009 19:59:29 +0000 (11:59 -0800)]
leds: add BD2802GU LED driver
ROHM BD2802GU is a RGB LED controller attached to i2c bus and specifically
engineered for decoration purposes. This RGB controller incorporates
lighting patterns and illuminates.
This driver is designed to minimize power consumption, so when there is no
emitting LED, it enters to reset state. And because the BD2802GU has lots
of features that can't be covered by the current LED framework, it
provides Advanced Configuration Function(ADF) mode, so that user
applications can set registers of BD2802GU directly.
Here are basic usage examples :
; to turn on LED (not blink)
$ echo 1 > /sys/class/leds/led1_R/brightness
; to blink LED
$ echo timer > /sys/class/leds/led1_R/trigger
$ echo 1 > /sys/class/leds/led1_R/delay_on
$ echo 1 > /sys/class/leds/led1_R/delay_off
; to turn off LED
$ echo 0 > /sys/class/leds/led1_R/brightness
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Kim Kyuwon <chammoru@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Felipe Balbi [Tue, 17 Feb 2009 11:18:11 +0000 (13:18 +0200)]
leds: Add gpio-led trigger
The gpio led trigger will allow leds to be triggered by
gpio events.
When we give the led a gpio number, the trigger will
request_irq() on that so we don't have to keep polling
for gpio state.
It's useful for usecases as n810's keypad leds that could
be triggered by the gpio event generated when user slides
up to show the keypad.
We also provide means for userland to tell us what is the
desired brightness for that special led when it goes on
so userland could use information from ambient light sensors
and not set led brightness too high if it's not necessary.
Signed-off-by: Felipe Balbi <me@felipebalbi.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Phil Sutter [Thu, 22 Jan 2009 18:35:48 +0000 (19:35 +0100)]
leds: Add rb532 LED driver for the User LED
Mikrotik built six LEDs into the Routerboard 532, from which one is
destined for custom use, the so called "User LED". This patch adds a
driver for it, based on the LEDs class.
Signed-off-by: Phil Sutter <n0-1@freewrt.org> Acked-by: Florian Fainelli <florian@openwrt.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Luotao Fu [Wed, 11 Feb 2009 21:24:40 +0000 (13:24 -0800)]
leds: simple driver for pwm driven LEDs
Add a simple driver for pwm driver LEDs. pwm_id and period can be defined
in board file. It is developed for pxa, however it is probably generic
enough to be used on other platforms with pwm.
Signed-off-by: Luotao Fu <l.fu@pengutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Add an LED driver using the DAC124S085 DAC from NatSemi
[randy.dunlap@oracle.com: use header files for interfaces] Signed-off-by: Guennadi Liakhovetski <lg@denx.de> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
leds: allow led-drivers to use a variable range of brightness values
This patch allows drivers to override the default maximum brightness value
of 255. We take care to preserve backwards-compatibility as much as
possible, so that user-space ABI doesn't change for existing drivers.
LED trigger code has also been updated to use the per-LED maximum.
Signed-off-by: Guennadi Liakhovetski <lg@denx.de> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Trent Piepho [Sat, 10 Jan 2009 17:26:01 +0000 (17:26 +0000)]
leds: Add openfirmware platform device support
Add bindings to support LEDs defined as of_platform devices in addition to
the existing bindings for platform devices.
New options in Kconfig allow the platform binding code and/or the
of_platform code to be turned on. The of_platform code is of course only
available on archs that have OF support.
The existing probe and remove methods are refactored to use new functions
create_gpio_led(), to create and register one led, and delete_gpio_led(),
to unregister and free one led. The new probe and remove methods for the
of_platform driver can then share most of the common probe and remove code
with the platform driver.
The suspend and resume methods aren't shared, but they are very short. The
actual led driving code is the same for LEDs created by either binding.
The OF bindings are based on patch by Anton Vorontsov
<avorontsov@ru.mvista.com>. They have been extended to allow multiple LEDs
per device.
Signed-off-by: Trent Piepho <tpiepho@freescale.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Sean MacLennan <smaclennan@pikatech.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
block: Add flag for telling the IO schedulers NOT to anticipate more IO
By default, CFQ will anticipate more IO from a given io context if the
previously completed IO was sync. This used to be fine, since the only
sync IO was reads and O_DIRECT writes. But with more "normal" sync writes
being used now, we don't want to anticipate for those.
Add a bio/request flag that informs the IO scheduler that this is a sync
request that we should not idle for. Introduce WRITE_ODIRECT specifically
for O_DIRECT writes, and make sure that the other sync writes set this
flag.
When you are going to be submitting several sync writes, we want to
give the IO scheduler a chance to merge some of them. Instead of
using the implicitly unplugging WRITE_SYNC variant, use WRITE_SYNC_PLUG
and rely on sync_buffer() doing the unplug when someone does a
wait_on_buffer()/lock_buffer().
projects / mirror_ubuntu-jammy-kernel.git / log