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cpuidle: move field disable from per-driver to per-cpu

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Andrew J.Schorr raises a question.  When he changes the disable setting on
a single CPU, it affects all the other CPUs.  Basically, currently, the
disable field is per-driver instead of per-cpu.  All the C states of the
same driver are shared by all CPU in the same machine.

The patch changes the `disable' field to per-cpu, so we could set this
separately for each cpu.

Signed-off-by: ShuoX Liu <shuox.liu@intel.com>
Reported-by: Andrew J.Schorr <aschorr@telemetry-investments.com>
Reviewed-by: Yanmin Zhang <yanmin_zhang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
ShuoX Liu 2012-07-03 19:05:31 +02:00 • committed by Rafael J. Wysocki
parent 6887a4131d
commit dc7fd275ae
4 changed files with 16 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/linux/cpuidle.h
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@ -34,6 +34,7 @@ struct cpuidle_driver;
struct cpuidle_state_usage {
void *driver_data;
unsigned long long disable;
unsigned long long usage;
unsigned long long time; /* in US */
};
@ -46,7 +47,6 @@ struct cpuidle_state {
unsigned int exit_latency; /* in US */
int power_usage; /* in mW */
unsigned int target_residency; /* in US */
unsigned int disable;
int (*enter) (struct cpuidle_device *dev,
struct cpuidle_driver *drv,