linux/Documentation
Bernie Thompson 1df0a4711f rtc: add ability to push out an existing wakealarm using sysfs
This adds the ability for the rtc sysfs code to handle += characters at
the beginning of a wakealarm setting string.  This will allow the user
to attempt to push out an existing wakealarm by a provided amount.

In the case that the += characters are provided but the alarm is not
active -EINVAL is returned.

his is useful, at least for my purposes in suspend/resume testing.  The
basic test goes something like:

1. Set a wake alarm from userspace 5 seconds in the future

2. Start the suspend process (echo mem > /sys/power/state)

3. After ~2.5 seconds if userspace is still running (using another
   thread to check this), move the wake alarm 5 more seconds

If the "move" involves an unset of the wakealarm then there's a period
   of time where the system is midway through suspending but has no wake
   alarm.  It will get stuck.

We'd rather not remove the "move" since the idea is to avoid a cancelled
suspend when the alarm fires _during_ suspend.  It is difficult for the
test to tell the difference between a suspend that was cancelled because
the alarm fired too early and a suspend that was

Signed-off-by: Bernie Thompson <bhthompson@chromium.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Doug Anderson <dianders@chromium.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-03 16:07:54 -07:00
..
ABI Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-07-02 16:15:23 -07:00
DocBook Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-07-02 16:14:35 -07:00
EDID drm: Add 1600x1200 (UXGA) screen resolution to the built-in EDIDs 2013-04-12 14:06:16 +10:00
PCI
RCU Merge branches 'cbnum.2013.06.10a', 'doc.2013.06.10a', 'fixes.2013.06.10a', 'srcu.2013.06.10a' and 'tiny.2013.06.10a' into HEAD 2013-06-10 13:46:44 -07:00
accounting
acpi ACPI/APEI: Update einj documentation for param1/param2 2013-06-06 15:28:11 -07:00
aoe
arm ARM SoC late changes 2013-07-02 14:42:51 -07:00
arm64 arm64: KVM: document kernel object mappings in HYP 2013-06-12 16:42:20 +01:00
auxdisplay
backlight backlight: lp855x: remove duplicate platform data 2013-04-29 18:28:19 -07:00
blackfin
block Documentation: cfq-iosched: update documentation help for cfq tunables 2013-04-09 14:57:06 +02:00
blockdev
bus-devices
cdrom
cgroups memcg: update TODO list in Documentation 2013-07-03 16:07:31 -07:00
connector
console TTY:console: update document console.txt 2013-05-21 10:21:57 -07:00
cpu-freq Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-05-05 13:23:27 -07:00
cpuidle cpuidle: make a single register function for all 2013-04-23 13:45:22 +02:00
cris
crypto drivers/dma: remove unused support for MEMSET operations 2013-07-03 16:07:42 -07:00
development-process
device-mapper DM RAID: Add message/status support for changing sync action 2013-04-24 11:42:43 +10:00
devicetree Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-07-03 09:46:29 -07:00
driver-model
dvb
early-userspace
extcon
fault-injection
fb
filesystems documentation: document the is_dirty_writeback aops callback 2013-07-03 16:07:40 -07:00
firmware_class
fmc FMC: add a char-device mezzanine driver 2013-06-18 15:42:15 -07:00
frv
hid
hwmon Finally eradicate CONFIG_HOTPLUG 2013-06-03 14:20:18 -07:00
i2c
i2o
ia64 Fix example error_injection_tool 2013-04-02 09:39:55 -07:00
ide
infiniband
input
ioctl
isdn
ja_JP
kbuild Finally eradicate CONFIG_HOTPLUG 2013-06-03 14:20:18 -07:00
kdump Add size restriction to the kdump documentation 2013-04-02 09:40:03 -07:00
ko_KR
laptops
leds leds: lp55xx: configure the clock detection 2013-04-01 11:04:53 -07:00
m68k block: remove refs to XD disks from documentation 2013-05-17 15:17:12 +02:00
make
memory-devices
metag
mips
misc-devices mei: bus: Add device enabling and disabling API 2013-04-08 16:57:15 -07:00
mmc
mn10300
mtd
namespaces
netlabel
networking tcp: doc : fix the syncookies default value 2013-06-24 00:26:26 -07:00
nfc
parisc
pcmcia
power PM / hibernate: Correct documentation 2013-05-14 01:58:43 +02:00
powerpc powerpc/tm: Fix userspace stack corruption on signal delivery for active transactions 2013-06-01 08:29:23 +10:00
pps
prctl
pti
ptp
rapidio rapidio: documentation update for enumeration changes 2013-05-24 16:22:50 -07:00
s390 s390/cio: add condev keyword to cio_ignore 2013-05-02 15:50:20 +02:00
scheduler sched: Rename sched.c as sched/core.c in comments and Documentation 2013-06-19 12:58:42 +02:00
scsi [SCSI] qla2xxx: Update copyright dates information in LICENSE.qla2xxx file. 2013-04-06 11:31:30 +01:00
security
serial stallion: final cleanup 2013-06-03 14:31:39 -07:00
sh
sound ALSA: hda - Add models for Dell headset jacks 2013-06-17 11:15:56 +02:00
spi
sysctl perf: Drop sample rate when sampling is too slow 2013-06-23 11:52:57 +02:00
target
thermal Thermal: update documentation for thermal_zone_device_register 2013-04-27 09:16:04 +08:00
timers nohz_full: Document additional restrictions 2013-06-10 13:42:38 -07:00
trace x86: Add NMI duration tracepoints 2013-06-23 11:52:58 +02:00
usb Driver core patches for 3.11-rc1 2013-07-02 11:44:19 -07:00
vDSO
video4linux [media] v4l2: Add a V4L2 driver for SI476X MFD 2013-04-18 21:20:34 -03:00
virtual Main features: 2013-07-03 10:31:38 -07:00
vm pagemap: prepare to reuse constant bits with page-shift 2013-07-03 16:07:26 -07:00
w1 w1: add family based automatic module loading 2013-06-03 14:09:14 -07:00
watchdog
wimax
x86 x86, microcode, amd: Early microcode patch loading support for AMD 2013-05-30 20:19:25 -07:00
xtensa xtensa: document MMUv3 setup sequence 2013-05-09 01:07:09 -07:00
zh_CN gpio: update gpio Chinese documentation 2013-04-16 18:47:22 +09:00
.gitignore
00-INDEX FMC: add documentation for the core 2013-06-18 15:41:03 -07:00
BUG-HUNTING
Changes
CodingStyle
DMA-API-HOWTO.txt
DMA-API.txt
DMA-ISA-LPC.txt
DMA-attributes.txt
HOWTO Documentation: Updated broken link in HOWTO 2013-06-03 14:22:57 -07:00
IPMI.txt
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
Intel-IOMMU.txt
Makefile
ManagementStyle
SAK.txt
SM501.txt
SecurityBugs
SubmitChecklist Finally eradicate CONFIG_HOTPLUG 2013-06-03 14:20:18 -07:00
SubmittingDrivers
SubmittingPatches checkpatch: add Suggested-by as a standard signature 2013-04-29 18:28:20 -07:00
VGA-softcursor.txt
applying-patches.txt
atomic_ops.txt
bad_memory.txt
basic_profiling.txt
bcache.txt bcache: clarify free/available/unused space 2013-05-15 00:42:52 -07:00
binfmt_misc.txt
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
bus-virt-phys-mapping.txt
cachetlb.txt
circular-buffers.txt
clk.txt clk: add clk_ignore_unused option to keep boot clocks on 2013-04-27 23:03:43 -07:00
coccinelle.txt Coccinelle: Add support to the SPFLAGS variable 2013-04-08 15:42:03 +02:00
cpu-hotplug.txt Finally eradicate CONFIG_HOTPLUG 2013-06-03 14:20:18 -07:00
cpu-load.txt
cputopology.txt
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
devices.txt block: remove refs to XD disks from documentation 2013-05-17 15:17:12 +02:00
digsig.txt
dma-buf-sharing.txt dma-buf: replace dma_buf_export() with dma_buf_export_named() 2013-05-01 16:35:36 +05:30
dmaengine.txt
dmatest.txt dmatest: do not allow to interrupt ongoing tests 2013-06-08 02:13:44 +05:30
dontdiff
dynamic-debug-howto.txt
edac.txt
eisa.txt
email-clients.txt
flexible-arrays.txt
futex-requeue-pi.txt
gcov.txt
gpio.txt Remove GENERIC_GPIO config option 2013-04-16 18:47:19 +09:00
highuid.txt
hw_random.txt
hwspinlock.txt
init.txt
initrd.txt
intel_txt.txt
io-mapping.txt
io_ordering.txt
iostats.txt iostats.txt: add easy-to-find description for field 6 2013-04-29 15:18:50 +02:00
irqflags-tracing.txt
isapnp.txt
java.txt
kernel-doc-nano-HOWTO.txt
kernel-docs.txt
kernel-parameters.txt Merge branch 'for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq 2013-07-02 19:53:30 -07:00
kernel-per-CPU-kthreads.txt kthread: Add kworker kthreads to OS-jitter documentation 2013-06-10 13:42:38 -07:00
kmemcheck.txt
kmemleak.txt
kobject.txt
kprobes.txt
kref.txt
ldm.txt
local_ops.txt
lockdep-design.txt
lockstat.txt
lockup-watchdogs.txt
logo.gif
logo.txt
magic-number.txt
md.txt MD: Fix typos in MD documentation 2013-04-24 11:42:42 +10:00
media-framework.txt
memory-barriers.txt
memory-hotplug.txt
mono.txt
mutex-design.txt
nommu-mmap.txt
numastat.txt
oops-tracing.txt
padata.txt
parport-lowlevel.txt
parport.txt
percpu-rw-semaphore.txt
pi-futex.txt
pinctrl.txt
pnp.txt
preempt-locking.txt
printk-formats.txt Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 13:47:37 -07:00
pwm.txt
ramoops.txt
rbtree.txt
remoteproc.txt
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt
rt-mutex-design.txt sched: Rename sched.c as sched/core.c in comments and Documentation 2013-06-19 12:58:42 +02:00
rt-mutex.txt
rtc.txt rtc: add ability to push out an existing wakealarm using sysfs 2013-07-03 16:07:54 -07:00
serial-console.txt
sgi-ioc4.txt
sgi-visws.txt
smsc_ece1099.txt
sparse.txt
spinlocks.txt sched: Rename sched.c as sched/core.c in comments and Documentation 2013-06-19 12:58:42 +02:00
stable_api_nonsense.txt
stable_kernel_rules.txt
static-keys.txt
svga.txt
sysfs-rules.txt
sysrq.txt Documentation/sysrq: fix inconstistent help message of sysrq key 2013-04-30 17:04:10 -07:00
this_cpu_ops.txt percpu: add documentation on this_cpu operations 2013-04-04 10:24:53 -07:00
unaligned-memory-access.txt
unicode.txt
unshare.txt
vfio.txt
vgaarbiter.txt
video-output.txt
vme_api.txt
volatile-considered-harmful.txt
workqueue.txt
ww-mutex-design.txt mutex: Add support for wound/wait style locks 2013-06-26 12:10:56 +02:00
xz.txt
zorro.txt