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authorIngo Molnar <mingo@kernel.org>2012-12-08 15:44:43 +0100
committerIngo Molnar <mingo@kernel.org>2012-12-08 15:44:43 +0100
commit38130ec08716ae2ece8060eca01607b58da7258c (patch)
tree71d0cd76ccfb2b960ddb6b820850269265389052 /kernel/sched/cputime.c
parente783377e93d4043a11013ce6e9173db34998e653 (diff)
parent1b2852b152be5150fbef7b585388ec43cf6f4415 (diff)
downloadlinaro-lsk-38130ec08716ae2ece8060eca01607b58da7258c.tar.gz
Merge tag 'sched-cputime-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into sched/core
Pull more cputime cleanups from Frederic Weisbecker: * Get rid of underscores polluting the vtime namespace * Consolidate context switch and tick handling * Improve debuggability by detecting irq unsafe callers Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/cputime.c')
-rw-r--r--kernel/sched/cputime.c31
1 files changed, 19 insertions, 12 deletions
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index b7f73176862..293b202fcf7 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -461,20 +461,33 @@ void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime
*st = cputime.stime;
}
-void vtime_account_system(struct task_struct *tsk)
+void vtime_account_system_irqsafe(struct task_struct *tsk)
{
unsigned long flags;
local_irq_save(flags);
- __vtime_account_system(tsk);
+ vtime_account_system(tsk);
local_irq_restore(flags);
}
-EXPORT_SYMBOL_GPL(vtime_account_system);
+EXPORT_SYMBOL_GPL(vtime_account_system_irqsafe);
+
+#ifndef __ARCH_HAS_VTIME_TASK_SWITCH
+void vtime_task_switch(struct task_struct *prev)
+{
+ if (is_idle_task(prev))
+ vtime_account_idle(prev);
+ else
+ vtime_account_system(prev);
+
+ vtime_account_user(prev);
+ arch_vtime_task_switch(prev);
+}
+#endif
/*
* Archs that account the whole time spent in the idle task
* (outside irq) as idle time can rely on this and just implement
- * __vtime_account_system() and __vtime_account_idle(). Archs that
+ * vtime_account_system() and vtime_account_idle(). Archs that
* have other meaning of the idle time (s390 only includes the
* time spent by the CPU when it's in low power mode) must override
* vtime_account().
@@ -482,16 +495,10 @@ EXPORT_SYMBOL_GPL(vtime_account_system);
#ifndef __ARCH_HAS_VTIME_ACCOUNT
void vtime_account(struct task_struct *tsk)
{
- unsigned long flags;
-
- local_irq_save(flags);
-
if (in_interrupt() || !is_idle_task(tsk))
- __vtime_account_system(tsk);
+ vtime_account_system(tsk);
else
- __vtime_account_idle(tsk);
-
- local_irq_restore(flags);
+ vtime_account_idle(tsk);
}
EXPORT_SYMBOL_GPL(vtime_account);
#endif /* __ARCH_HAS_VTIME_ACCOUNT */