diff options
| author | Deepthi Dharwar <deepthi@linux.vnet.ibm.com> | 2011-10-28 16:20:24 +0530 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2011-11-06 21:13:43 -0500 |
| commit | b25edc42bfb9602f0503474b2c94701d5536ce60 (patch) | |
| tree | 5d3b8634606daa99fe5dc86ade108400ecf3a5fd | |
| parent | e978aa7d7d57d04eb5f88a7507c4fb98577def77 (diff) | |
| download | linux-stable-b25edc42bfb9602f0503474b2c94701d5536ce60.tar.gz linux-stable-b25edc42bfb9602f0503474b2c94701d5536ce60.tar.bz2 linux-stable-b25edc42bfb9602f0503474b2c94701d5536ce60.zip | |
cpuidle: Remove CPUIDLE_FLAG_IGNORE and dev->prepare()
The cpuidle_device->prepare() mechanism causes updates to the
cpuidle_state[].flags, setting and clearing CPUIDLE_FLAG_IGNORE
to tell the governor not to chose a state on a per-cpu basis at
run-time. State demotion is now handled by the driver and it returns
the actual state entered. Hence, this mechanism is not required.
Also this removes per-cpu flags from cpuidle_state enabling
it to be made global.
Reference:
https://lkml.org/lkml/2011/3/25/52
Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm>
Signed-off-by: Trinabh Gupta <g.trinabh@gmail.com>
Tested-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | drivers/cpuidle/cpuidle.c | 10 | ||||
| -rw-r--r-- | drivers/cpuidle/governors/menu.c | 2 | ||||
| -rw-r--r-- | include/linux/cpuidle.h | 3 |
3 files changed, 0 insertions, 15 deletions
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index 88bd12104396..f66bcf9bfe93 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -83,16 +83,6 @@ int cpuidle_idle_call(void) hrtimer_peek_ahead_timers(); #endif - /* - * Call the device's prepare function before calling the - * governor's select function. ->prepare gives the device's - * cpuidle driver a chance to update any dynamic information - * of its cpuidle states for the current idle period, e.g. - * state availability, latencies, residencies, etc. - */ - if (dev->prepare) - dev->prepare(dev); - /* ask the governor for the next state */ next_state = cpuidle_curr_governor->select(dev); if (need_resched()) { diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c index e4b200c5b441..af724e823c8e 100644 --- a/drivers/cpuidle/governors/menu.c +++ b/drivers/cpuidle/governors/menu.c @@ -288,8 +288,6 @@ static int menu_select(struct cpuidle_device *dev) for (i = CPUIDLE_DRIVER_STATE_START; i < dev->state_count; i++) { struct cpuidle_state *s = &dev->states[i]; - if (s->flags & CPUIDLE_FLAG_IGNORE) - continue; if (s->target_residency > data->predicted_us) continue; if (s->exit_latency > latency_req) diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h index 8da811bcdbdb..c6d85cf90eb2 100644 --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -47,7 +47,6 @@ struct cpuidle_state { /* Idle State Flags */ #define CPUIDLE_FLAG_TIME_VALID (0x01) /* is residency time measurable? */ -#define CPUIDLE_FLAG_IGNORE (0x100) /* ignore during this idle period */ #define CPUIDLE_DRIVER_FLAGS_MASK (0xFFFF0000) @@ -93,8 +92,6 @@ struct cpuidle_device { struct completion kobj_unregister; void *governor_data; int safe_state_index; - - int (*prepare) (struct cpuidle_device *dev); }; DECLARE_PER_CPU(struct cpuidle_device *, cpuidle_devices); |