Julius Werner a474a51549 cpuidle: Measure idle state durations with monotonic clock ... Many cpuidle drivers measure their time spent in an idle state by reading the wallclock time before and after idling and calculating the difference. This leads to erroneous results when the wallclock time gets updated by another processor in the meantime, adding that clock adjustment to the idle state's time counter. If the clock adjustment was negative, the result is even worse due to an erroneous cast from int to unsigned long long of the last_residency variable. The negative 32 bit integer will zero-extend and result in a forward time jump of roughly four billion milliseconds or 1.3 hours on the idle state residency counter. This patch changes all affected cpuidle drivers to either use the monotonic clock for their measurements or make use of the generic time measurement wrapper in cpuidle.c, which was already working correctly. Some superfluous CLIs/STIs in the ACPI code are removed (interrupts should always already be disabled before entering the idle function, and not get reenabled until the generic wrapper has performed its second measurement). It also removes the erroneous cast, making sure that negative residency values are applied correctly even though they should not appear anymore. Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Tested-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Len Brown <len.brown@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>		2012-11-27 14:17:58 +01:00
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acpi	cpuidle: Measure idle state durations with monotonic clock	2012-11-27 14:17:58 +01:00
amba
ata	Merge branch 'samsung_platform_data' into staging/for_v3.7	2012-10-05 22:32:05 -03:00
atm	sections: fix section conflicts in drivers/atm	2012-10-06 03:04:40 +09:00
auxdisplay
base	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc	2012-11-10 21:58:34 +01:00
bcma	bcma: fix unregistration of cores	2012-10-15 14:45:51 -04:00
block	loop: Make explicit loop device destruction lazy	2012-10-30 08:37:31 +01:00
bluetooth
bus
cdrom
char	sonypi: suspend/resume callbacks should be conditionally compiled on CONFIG_PM_SLEEP	2012-10-25 12:05:50 -07:00
clk
clocksource
connector
cpufreq	cpufreq / powernow-k8: Change maintainer's email address	2012-10-31 21:02:57 +01:00
cpuidle	cpuidle: Measure idle state durations with monotonic clock	2012-11-27 14:17:58 +01:00
crypto	ARM: soc: late platform updates	2012-10-07 20:55:16 +09:00
dca
devfreq
dio
dma	Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma	2012-10-26 14:59:01 -07:00
edac	amd64_edac:__amd64_set_scrub_rate(): avoid overindexing scrubrates[]	2012-10-24 16:13:27 +02:00
eisa
extcon	extcon : register for cable interest by cable name	2012-10-23 16:32:18 +09:00
firewire	firewire: cdev: fix user memory corruption (i386 userland on amd64 kernel)	2012-10-09 18:26:28 +02:00
firmware	firmware/memmap: avoid type conflicts with the generic memmap_init()	2012-10-19 14:07:47 -07:00
gpio	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc	2012-11-10 21:58:34 +01:00
gpu	drm/vmwgfx: Fix a case where the code would BUG when trying to pin GMR memory	2012-11-09 20:49:06 +10:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2012-11-09 06:56:23 +01:00
hsi
hv	Drivers: hv: Cleanup error handling in vmbus_open()	2012-10-24 15:46:27 -07:00
hwmon	hwmon: Fix chip feature table headers	2012-11-05 21:54:40 +01:00
hwspinlock
i2c	Merge branch 'i2c-embedded/for-current' of git://git.pengutronix.de/git/wsa/linux	2012-11-03 15:14:54 -07:00
ide	sections: fix section conflicts in drivers/ide	2012-10-06 03:04:41 +09:00
idle	cpuidle: Measure idle state durations with monotonic clock	2012-11-27 14:17:58 +01:00
iio	iio: Remove duplicates for light/ in Kconfig and Makefile	2012-10-19 19:44:06 +01:00
infiniband	Merge branches 'cxgb4' and 'mlx4' into for-next	2012-10-23 09:03:49 -07:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2012-11-02 16:11:15 -07:00
iommu	iommu/tegra: smmu: Fix deadly typo	2012-10-24 16:58:53 +02:00
irqchip
isdn	isdn: Make CONFIG_ISDN depend on CONFIG_NETDEVICES	2012-11-07 18:59:26 -05:00
leds	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds	2012-10-10 20:14:07 +09:00
lguest	Merge branch 'virtio-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux	2012-10-07 21:04:56 +09:00
macintosh	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2012-10-06 03:16:12 +09:00
md	MD RAID10: Fix oops when creating RAID10 arrays via dm-raid.c	2012-10-31 11:42:30 +11:00
media	[media] Kconfig: Fix dependencies for driver autoselect options	2012-10-17 16:45:56 -03:00
memory
memstick
message
mfd	1. New drivers:	2012-10-07 17:29:24 +09:00
misc	pwm: Changes for v3.7-rc1	2012-10-10 20:15:24 +09:00
mmc	mmc: sdhci-s3c: fix the card detection in runtime-pm	2012-11-07 15:40:52 -05:00
mtd	mtd: Disable mtdchar mmap on MMU systems	2012-10-09 15:08:42 +01:00
net	gianfar: ethernet vanishes after restoring from hibernation	2012-11-09 17:08:36 -05:00
nfc
nubus
of	of/platform: sparse fix	2012-10-17 15:53:03 -05:00
oprofile	mm: use mm->exe_file instead of first VM_EXECUTABLE vma->vm_file	2012-10-09 16:22:18 +09:00
parisc
parport	Xtensa patchset for 3.7	2012-10-09 16:11:46 +09:00
pci	PCI/portdrv: Don't create hotplug slots unless port supports hotplug	2012-11-05 16:59:59 -07:00
pcmcia	Merge branch 'testing/driver-warnings' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc into fixes	2012-10-19 15:40:18 -07:00
pinctrl	pinctrl: samsung and exynos need to depend on OF && GPIOLIB	2012-11-06 10:02:14 +01:00
platform	Merge branches 'fixes-for-37', 'ec' and 'thermal' into release	2012-10-09 01:47:35 -04:00
pnp
power	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux	2012-10-13 11:27:59 +09:00
pps	idr: rename MAX_LEVEL to MAX_IDR_LEVEL	2012-10-06 03:04:56 +09:00
ps3
ptp
pwm	pwm: Changes for v3.7-rc1	2012-10-10 20:15:24 +09:00
rapidio	rapidio: update for destination ID allocation	2012-10-11 08:50:15 +09:00
regulator	MFD bits for the 3.7 merge window.	2012-10-05 12:01:30 +09:00
remoteproc	Merge branch 'virtio-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux	2012-10-07 21:04:56 +09:00
rpmsg	Merge branch 'virtio-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux	2012-10-07 21:04:56 +09:00
rtc	drivers/rtc/rtc-imxdi.c: add missing spin lock initialization	2012-10-25 14:37:53 -07:00
s390	s390/cio: fix length calculation in idset.c	2012-11-06 22:39:54 +01:00
sbus
scsi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc	2012-11-10 21:58:34 +01:00
sfi
sh	sh: Fix up more fallout from pointless ARM __iomem churn.	2012-10-15 14:08:48 +09:00
sn
spi	spi: Some minor MXS fixes	2012-10-28 11:13:54 -07:00
ssb
staging	Staging driver fixes for 3.7-rc3	2012-10-26 10:25:31 -07:00
target	target: Fix incorrect usage of nested IRQ spinlocks in ABORT_TASK path	2012-11-01 00:38:45 -07:00
tc
thermal	exynos4_tmu_driver_ids should be exynos_tmu_driver_ids.	2012-11-03 09:52:55 +08:00
tty	Revert "serial: omap: fix software flow control"	2012-10-24 11:57:21 -07:00
uio	mm: kill vma flag VM_RESERVED and mm->reserved_vm counter	2012-10-09 16:22:19 +09:00
usb	usb: gadget: g_ether: fix frame size check for 802.1Q	2012-11-07 21:12:26 -05:00
uwb
vfio	vfio: Fix PCI INTx disable consistency	2012-10-10 09:10:32 -06:00
vhost	vhost: fix mergeable bufs on BE hosts	2012-10-24 23:19:30 -04:00
video	Bug-fixes:	2012-11-02 13:26:11 -07:00
virt
virtio	virtio: Don't access index after unregister.	2012-11-09 14:54:24 +10:30
vlynq
vme
w1
watchdog	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu	2012-10-07 21:06:10 +09:00
xen	Bug-fixes:	2012-11-10 06:56:21 +01:00
zorro
Kconfig
Makefile	IPMI: Change link order	2012-10-16 18:07:12 -07:00