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Rafael J. Wysocki b86ff9820f PM / Sleep: Add user space interface for manipulating wakeup sources, v3 
Android allows user space to manipulate wakelocks using two
sysfs file located in /sys/power/, wake_lock and wake_unlock.
Writing a wakelock name and optionally a timeout to the wake_lock
file causes the wakelock whose name was written to be acquired (it
is created before is necessary), optionally with the given timeout.
Writing the name of a wakelock to wake_unlock causes that wakelock
to be released.

Implement an analogous interface for user space using wakeup sources.
Add the /sys/power/wake_lock and /sys/power/wake_unlock files
allowing user space to create, activate and deactivate wakeup
sources, such that writing a name and optionally a timeout to
wake_lock causes the wakeup source of that name to be activated,
optionally with the given timeout.  If that wakeup source doesn't
exist, it will be created and then activated.  Writing a name to
wake_unlock causes the wakeup source of that name, if there is one,
to be deactivated.  Wakeup sources created with the help of
wake_lock that haven't been used for more than 5 minutes are garbage
collected and destroyed.  Moreover, there can be only WL_NUMBER_LIMIT
wakeup sources created with the help of wake_lock present at a time.

The data type used to track wakeup sources created by user space is
called "struct wakelock" to indicate the origins of this feature.

This version of the patch includes an rbtree manipulation fix from John Stultz.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: NeilBrown <neilb@suse.de>
 		2012-05-01 21:26:05 +02:00
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accessibility
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acpi Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-04-25 21:29:26 -07:00
amba ARM: 7366/3: amba: Remove AMBA level regulator support 2012-04-13 14:04:08 +01:00
ata libata: forbid port runtime pm by default, fixing regression 2012-04-18 14:33:25 -04:00
atm Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
auxdisplay
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base PM / Sleep: Add user space interface for manipulating wakeup sources, v3 2012-05-01 21:26:05 +02:00
bcma bcma: use fallback sprom if no on chip sprom is available 2012-04-16 13:32:01 -04:00
block Fixes in various components: 2012-04-20 11:31:00 -07:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth 2012-04-09 15:47:49 -04:00
cdrom powerpc: Remove some of the legacy iSeries specific device drivers 2012-03-16 09:28:05 +11:00
char tty and serial fixes for 3.4-rc2 2012-04-12 15:36:33 -07:00
clk clk: make CONFIG_COMMON_CLK invisible 2012-03-19 09:37:11 +00:00
clocksource Revert "clocksource: Load the ACPI PM clocksource asynchronously" 2012-04-12 00:05:05 +02:00
connector
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cpufreq cpufreq: OMAP: fix build errors: depends on ARCH_OMAP2PLUS 2012-04-13 17:57:40 -07:00
cpuidle Merge branches 'idle-fix' and 'misc' into release 2012-04-06 21:48:59 -04:00
crypto crypto: talitos - properly lock access to global talitos registers 2012-04-09 15:13:40 +08:00
dca
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devfreq ARM: global cleanups 2012-03-27 16:03:32 -07:00
dio
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dma Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma 2012-04-26 15:33:36 -07:00
edac Merge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2012-04-06 17:56:20 -07:00
eisa
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firewire Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
firmware
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gpio ARM: pxa: fix gpio wakeup setting 2012-04-27 10:46:45 +08:00
gpu drm/i915: Set the Stencil Cache eviction policy to non-LRA mode. 2012-04-28 08:05:15 +01:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2012-04-20 10:39:33 -07:00
hsi HSI: hsi_char: Remove max_data_size from sysfs 2012-04-23 14:23:32 +03:00
hv Tools: hv: Support enumeration from all the pools 2012-03-16 13:36:04 -07:00
hwmon hwmon: (fam15h_power) Fix pci_device_id array 2012-04-26 08:40:08 -07:00
hwspinlock
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i2c i2c: prevent spurious interrupt on Designware controllers 2012-04-10 08:09:03 -07:00
ide Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
idle simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
ieee802154
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infiniband A few fixes for regressions introduced in 3.4-rc1: 2012-04-26 15:35:35 -07:00
input mfd: Convert twl6040 to i2c driver, and separate it from twl core 2012-04-16 16:45:34 +02:00
iommu Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
isdn tty and serial fixes for 3.4-rc2 2012-04-12 15:36:33 -07:00
leds leds-atmel-pwm.c: Make pwmled_probe() __devinit 2012-04-17 16:29:31 +02:00
lguest
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macintosh Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
mca
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md md: fix possible corruption of array metadata on shutdown. 2012-04-24 10:23:16 +10:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2012-04-21 12:43:23 -07:00
memstick memstick: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:19 +08:00
message Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
mfd mfd: Fix modular builds of rc5t583 regulator support 2012-04-16 21:27:07 +02:00
misc Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
mmc Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma 2012-04-26 15:33:36 -07:00
mtd Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma 2012-04-26 15:33:36 -07:00
net drivers/net: Do not free an IRQ if its request failed 2012-04-21 16:41:11 -04:00
nfc
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nubus Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
of gpio: Fix range check in of_gpio_simple_xlate() 2012-04-10 14:20:56 -06:00
oprofile simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
parisc Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
parport
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pci Merge branch 'for-v3.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2012-04-27 19:32:37 -07:00
pcmcia Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia 2012-03-29 16:00:48 -07:00
pinctrl pinctrl: implement pinctrl_check_ops 2012-04-11 09:31:02 +02:00
platform Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-26 15:24:45 -07:00
pnp Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-03-30 16:45:39 -07:00
power Various small bugfixes and enhancements, plus two new drivers: 2012-03-30 16:09:02 -07:00
pps
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ps3
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ptp phc: Update author's email address. 2012-03-17 01:41:43 -07:00
rapidio rapidio/tsi721: fix bug in register offset definitions 2012-03-15 17:03:03 -07:00
regulator regulator: Fix a build warning in the anatop driver for 3.4 2012-04-10 10:26:41 -07:00
remoteproc simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
rpmsg
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rtc drivers/rtc/rtc-ds1307.c: fix BUG shown with lock debugging enabled 2012-04-25 21:26:34 -07:00
s390 [S390] s390/char/vmur.c: fix memory leak 2012-04-11 14:28:24 +02:00
sbus Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
scsi SCSI: Fix error handling when no ULD is attached 2012-04-15 11:08:53 -07:00
sfi
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sh SuperH updates for 3.4 merge window 2012-03-30 00:09:17 -07:00
sn
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spi spi/spi-bfin5xx: Fix flush of last bit after each spi transfer 2012-04-27 12:20:39 -06:00
ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
staging staging: ozwpan: Fix bug where kfree is called twice. 2012-04-26 12:40:53 -07:00
target tcm_fc: Do not free tpg structure during wq allocation failure 2012-04-06 18:57:05 -07:00
tc
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thermal thermal: Fix for setting the thermal zone mode to enable/disable 2012-03-22 01:10:18 -04:00
tty drivers/tty/amiserial.c: add missing tty_unlock 2012-04-19 19:15:35 -07:00
uio
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usb usb: fixes for v3.4-rc cycle 2012-04-27 07:50:34 -07:00
uwb uwb: fix error handling 2012-04-18 13:15:51 -07:00
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-04-22 21:02:57 -07:00
video blackfin: fix compile error in bfin-lq035q1-fb.c 2012-04-26 14:46:51 -04:00
virt
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virtio virtio_balloon: fix handling of PAGE_SIZE != 4k 2012-04-15 11:51:06 +03:00
vlynq
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w1
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watchdog hpwdt: Only BYTE reads/writes to WD Timer port 0x72 2012-04-26 14:38:07 +02:00
xen xen/acpi: Workaround broken BIOSes exporting non-existing C-states. 2012-04-26 22:07:28 -04:00
zorro
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Kconfig Merge branch 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi 2012-04-02 09:50:40 -07:00
Makefile Merge branch 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi 2012-04-02 09:50:40 -07:00