linux/arch/sh
Deepthi Dharwar e978aa7d7d cpuidle: Move dev->last_residency update to driver enter routine; remove dev->last_state
Cpuidle governor only suggests the state to enter using the
governor->select() interface, but allows the low level driver to
override the recommended state. The actual entered state
may be different because of software or hardware demotion. Software
demotion is done by the back-end cpuidle driver and can be accounted
correctly. Current cpuidle code uses last_state field to capture the
actual state entered and based on that updates the statistics for the
state entered.

Ideally the driver enter routine should update the counters,
and it should return the state actually entered rather than the time
spent there. The generic cpuidle code should simply handle where
the counters live in the sysfs namespace, not updating the counters.

Reference:
https://lkml.org/lkml/2011/3/25/52

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 21:13:30 -05:00
..
boards Merge branch 'sh-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x 2011-08-01 06:10:16 -10:00
boot sh: Remove compressed kernel libgcc dependency. 2011-06-06 17:57:58 +09:00
cchips sh: Convert to new function names 2011-03-29 14:48:13 +02:00
configs sh: fix compile error using sh7757lcr_defconfig 2011-06-21 17:40:42 +09:00
drivers PCI: Make the struct pci_dev * argument of pci_fixup_irqs const. 2011-07-22 08:26:06 -07:00
include sh: Fix conflicting definitions of ptrace_triggered 2011-08-03 12:37:22 +09:00
kernel cpuidle: Move dev->last_residency update to driver enter routine; remove dev->last_state 2011-11-06 21:13:30 -05:00
lib sh: Ensure ST40-300 BogoMIPS value is consistent 2011-02-15 16:24:05 +09:00
lib64 Fix common misspellings 2011-03-31 11:26:23 -03:00
math-emu perf: Remove the nmi parameter from the swevent and overflow interface 2011-07-01 11:06:35 +02:00
mm Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:44:39 -07:00
oprofile sh: remove warning and warning_symbol from struct stacktrace_ops 2011-05-23 14:42:15 +09:00
tools sh: Add support for AP-SH4AD-0A board. 2011-01-13 18:36:21 +09:00
Kconfig Merge branch 'apei' into apei-release 2011-08-03 11:30:42 -04:00
Kconfig.cpu sh: Turn on speculative return for SH7785 and SH7786 2010-02-18 18:54:18 +09:00
Kconfig.debug lib: consolidate DEBUG_STACK_USAGE option 2011-05-25 08:39:54 -07:00
Makefile serial: sh-sci: Abstract register maps. 2011-06-14 12:40:19 +09:00