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locking, sched: Annotate thread_group_cputimer as raw

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The thread_group_cputimer lock can be taken in atomic context and therefore
cannot be preempted on -rt - annotate it.

In mainline this change documents the low level nature of
the lock - otherwise there's no functional difference. Lockdep
and Sparse checking will work as usual.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
2009-07-25 18:56:56 +02:00
committed by Ingo Molnar
parent 07354eb1a7
commit ee30a7b2fc
4 changed files with 15 additions and 15 deletions
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12
kernel/sched_stats.h
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@@ -282,10 +282,10 @@ static inline void account_group_user_time(struct task_struct *tsk,
if (!cputimer->running)
return;
spin_lock(&cputimer->lock);
raw_spin_lock(&cputimer->lock);
cputimer->cputime.utime =
cputime_add(cputimer->cputime.utime, cputime);
spin_unlock(&cputimer->lock);
raw_spin_unlock(&cputimer->lock);
}
/**
@@ -306,10 +306,10 @@ static inline void account_group_system_time(struct task_struct *tsk,
if (!cputimer->running)
return;
spin_lock(&cputimer->lock);
raw_spin_lock(&cputimer->lock);
cputimer->cputime.stime =
cputime_add(cputimer->cputime.stime, cputime);
spin_unlock(&cputimer->lock);
raw_spin_unlock(&cputimer->lock);
}
/**
@@ -330,7 +330,7 @@ static inline void account_group_exec_runtime(struct task_struct *tsk,
if (!cputimer->running)
return;
spin_lock(&cputimer->lock);
raw_spin_lock(&cputimer->lock);
cputimer->cputime.sum_exec_runtime += ns;
spin_unlock(&cputimer->lock);
raw_spin_unlock(&cputimer->lock);
}