linux/drivers
Deepthi Dharwar 46bcfad7a8 cpuidle: Single/Global registration of idle states
This patch makes the cpuidle_states structure global (single copy)
instead of per-cpu. The statistics needed on per-cpu basis
by the governor are kept per-cpu. This simplifies the cpuidle
subsystem as state registration is done by single cpu only.
Having single copy of cpuidle_states saves memory. Rare case
of asymmetric C-states can be handled within the cpuidle driver
and architectures such as POWER do not have asymmetric C-states.

Having single/global registration of all the idle states,
dynamic C-state transitions on x86 are handled by
the boot cpu. Here, the boot cpu  would disable all the devices,
re-populate the states and later enable all the devices,
irrespective of the cpu that would receive the notification first.

Reference:
https://lkml.org/lkml/2011/4/25/83

Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Trinabh Gupta <g.trinabh@gmail.com>
Tested-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2011-11-06 21:13:58 -05:00
..
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acpi cpuidle: Single/Global registration of idle states 2011-11-06 21:13:58 -05:00
amba
ata drivers/ata/sata_dwc_460ex.c: add missing kfree 2011-08-18 23:58:11 -04:00
atm
auxdisplay
base PM / Clocks: Do not acquire a mutex under a spinlock 2011-09-26 19:40:23 +02:00
bcma bcma: add uevent to the bus, to autoload drivers 2011-08-22 14:21:41 -04:00
block floppy: use del_timer_sync() in init cleanup 2011-09-21 10:22:11 +02:00
bluetooth Bluetooth: add support for 2011 mac mini 2011-09-17 17:16:03 -03:00
cdrom
char TPM: Zero buffer after copying to userspace 2011-09-23 09:46:41 +10:00
clk
clocksource Merge branch 'common/core' into sh-latest 2011-08-08 16:33:54 +09:00
connector
cpufreq drivers/cpufreq/pcc-cpufreq.c: avoid NULL pointer dereference 2011-09-14 18:09:38 -07:00
cpuidle cpuidle: Single/Global registration of idle states 2011-11-06 21:13:58 -05:00
crypto
dca
dio
dma dmaengine/ste_dma40: fix memory leak due to prepared descriptors 2011-09-05 17:08:26 +05:30
edac i7core_edac: fixed typo in error count calculation 2011-08-18 14:07:15 -07:00
eisa eisa/pci_eisa.c: fix BUG introduced by 005bdad7b8 2011-08-04 06:32:51 -10:00
firewire firewire: ohci: add no MSI quirk for O2Micro controller 2011-09-16 22:22:10 +02:00
firmware firmware: fix google/gsmi.c build warning 2011-08-08 13:53:49 -07:00
gpio gpio-pca953x: fix gpio_base 2011-10-13 13:49:37 -06:00
gpu drm/radeon/kms/atom: fix handling of FB scratch indices 2011-10-19 09:47:47 +01:00
hid Merge branch 'for-linus' of git://github.com/dtor/input 2011-09-16 14:09:19 -07:00
hwmon hwmon: (w83627ehf) Fix negative 8-bit temperature values 2011-10-20 07:17:08 -07:00
hwspinlock
i2c i2c-tegra: fix possible race condition after tx 2011-09-07 00:13:40 +01:00
ide ide: Fix file references in drivers/ide/ 2011-10-13 18:25:11 +12:00
idle cpuidle: Single/Global registration of idle states 2011-11-06 21:13:58 -05:00
ieee802154
infiniband [SCSI] cxgb3i: convert cdev->l2opt to use rcu to prevent NULL dereference 2011-09-26 09:28:01 -05:00
input Merge branch 'for-linus' of git://github.com/dtor/input 2011-10-05 09:22:38 -07:00
iommu intel-iommu: fix superpage support in pfn_to_dma_pte() 2011-10-19 12:06:22 +01:00
isdn
leds drivers/leds/ledtrig-timer.c: fix broken sysfs delay handling 2011-09-14 18:09:38 -07:00
lguest
macintosh
mca
md dm kcopyd: fix job_pool leak 2011-10-23 20:55:17 +01:00
media [media] videodev: fix a NULL pointer dereference in v4l2_device_release() 2011-10-19 09:48:08 -02:00
memstick
message
mfd mfd: Fix generic irq chip ack function name for jz4740-adc 2011-09-21 13:06:34 +02:00
misc lis3: fix regression of HP DriveGuard with 8bit chip 2011-10-03 20:51:51 -07:00
mmc Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2011-09-21 13:20:21 -07:00
mtd UBI: do not link debug messages when debugging is disabled 2011-08-19 19:02:27 +03:00
net r8169: fix wrong eee setting for rlt8111evl 2011-10-19 18:48:17 -04:00
nfc
nubus
of Revert "dt: add of_alias_scan and of_alias_get_id" 2011-08-04 11:26:24 +01:00
oprofile
parisc
parport
pci PCI: Disable MPS configuration by default 2011-10-04 09:52:28 -07:00
pcmcia
platform acer-wmi: support Lenovo ideapad S205 wifi switch 2011-08-05 15:21:52 -04:00
pnp
power s3c-adc-battery: Fix compilation error due to missing header (module.h) 2011-08-19 21:01:46 +04:00
pps
ps3
ptp
rapidio rapidio: fix use of non-compatible registers 2011-08-25 16:25:34 -07:00
regulator
rtc drivers/rtc/rtc-s3c.c: fix no occurrence of alarm interrupt 2011-09-14 18:09:38 -07:00
s390 [S390] cio: fix cio_tpi ignoring adapter interrupts 2011-09-26 16:40:50 +02:00
sbus
scsi [SCSI] libsas: fix panic when single phy is disabled on a wide port 2011-10-02 13:28:55 -05:00
sfi
sh Merge branch 'common/core' into sh-latest 2011-08-08 16:33:54 +09:00
sn
spi spi-topcliff-pch: Fix overrun issue 2011-10-04 10:10:50 -06:00
ssb
staging Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus 2011-10-10 14:39:03 +12:00
target iscsi-target: Fix sendpage breakage with proper padding+DataDigest iovec offsets 2011-09-16 23:47:07 +00:00
tc
telephony
thermal thermal: make THERMAL_HWMON implementation fully internal 2011-08-02 14:51:57 -04:00
tty Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus 2011-10-10 14:39:03 +12:00
uio
usb USB: xHCI: prevent infinite loop when processing MSE event 2011-09-19 17:15:47 -07:00
uwb
vhost
video backlight: Declare backlight_types[] const 2011-09-10 14:00:02 -07:00
virt
virtio
vlynq
w1 MAINTAINERS: Evgeniy has moved 2011-08-25 16:25:33 -07:00
watchdog watchdog: Initconst section fixes for watchdog 2011-09-20 14:32:00 +02:00
xen xen/irq: Alter the locking to use a mutex instead of a spinlock. 2011-09-15 04:32:02 -04:00
zorro zorro: Defer device_register() until all devices have been identified 2011-09-22 12:59:35 -07:00
Kconfig
Makefile