The patch titled
Subject: drivers/idle/intel_idle.c: remove redundant local_irq_disable() call
has been removed from the -mm tree. Its filename was
drivers-idle-intel_idlec-remove-redundant-local_irq_disable-call.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
From: Yanmin Zhang <yanmin_zhang@xxxxxxxxxxxxxxx>
Subject: drivers/idle/intel_idle.c: remove redundant local_irq_disable() call
irq disabling happens earlier in process_32.c:cpu_idle. Basically,
cpuidle_state->enter is called, cpu irq is disabled. cpuidle_state->enter
would turn on irq when exiting.
intel_idle doesn't follow this assumption. Although it doesn't cause real
issue, it misleads developers. Remove the call to local_irq_disable() at
entry.
[akpm@xxxxxxxxxxxxxxxxxxxx: add comment]
Signed-off-by: mzha38X <mingmingx.zhang@xxxxxxxxx>
Cc: "Li, Shaohua" <shaohua.li@xxxxxxxxx>
Cc: "Brown, Len" <len.brown@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/idle/intel_idle.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff -puN drivers/idle/intel_idle.c~drivers-idle-intel_idlec-remove-redundant-local_irq_disable-call drivers/idle/intel_idle.c
--- a/drivers/idle/intel_idle.c~drivers-idle-intel_idlec-remove-redundant-local_irq_disable-call
+++ a/drivers/idle/intel_idle.c
@@ -232,6 +232,7 @@ static int get_driver_data(int cstate)
* @drv: cpuidle driver
* @index: index of cpuidle state
*
+ * Must be called under local_irq_disable().
*/
static int intel_idle(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
@@ -247,8 +248,6 @@ static int intel_idle(struct cpuidle_dev
cstate = (((eax) >> MWAIT_SUBSTATE_SIZE) & MWAIT_CSTATE_MASK) + 1;
- local_irq_disable();
-
/*
* leave_mm() to avoid costly and often unnecessary wakeups
* for flushing the user TLB's associated with the active mm.
_
Patches currently in -mm which might be from yanmin_zhang@xxxxxxxxxxxxxxx are
origin.patch
linux-next.patch
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