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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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2
include/linux/init_task.h
View File

@@ -42,7 +42,7 @@ extern struct fs_struct init_fs;
.cputimer = { \
.cputime = INIT_CPUTIME, \
.running = 0, \
.lock = __SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \
.lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \
}, \
.cred_guard_mutex = \
__MUTEX_INITIALIZER(sig.cred_guard_mutex), \

4
include/linux/sched.h
View File

@@ -510,7 +510,7 @@ struct task_cputime {
struct thread_group_cputimer {
struct task_cputime cputime;
int running;
spinlock_t lock;
raw_spinlock_t lock;
};
#include <linux/rwsem.h>
@@ -2566,7 +2566,7 @@ void thread_group_cputimer(struct task_struct *tsk, struct task_cputime *times);
static inline void thread_group_cputime_init(struct signal_struct *sig)
{
spin_lock_init(&sig->cputimer.lock);
raw_spin_lock_init(&sig->cputimer.lock);
}
/*