diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2010-06-16 16:58:34 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-09-13 11:12:00 +0200 |
| commit | 2737c49f29a29f3d3645ba0778aa7a8798f32249 (patch) | |
| tree | 28a56a7f4b31abe2ef79ff535755677781a70c3a /kernel/time | |
| parent | ddb6c9b58a19edcfac93ac670b066c836ff729f1 (diff) | |
| download | lwn-2737c49f29a29f3d3645ba0778aa7a8798f32249.tar.gz lwn-2737c49f29a29f3d3645ba0778aa7a8798f32249.zip | |
locking, timer_stats: Annotate table_lock as raw
The table_lock 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.
Reported-by: Andreas Sundebo <kernel@sundebo.dk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Andreas Sundebo <kernel@sundebo.dk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/timer_stats.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c index a5d0a3a85dd8..0b537f27b559 100644 --- a/kernel/time/timer_stats.c +++ b/kernel/time/timer_stats.c @@ -81,7 +81,7 @@ struct entry { /* * Spinlock protecting the tables - not taken during lookup: */ -static DEFINE_SPINLOCK(table_lock); +static DEFINE_RAW_SPINLOCK(table_lock); /* * Per-CPU lookup locks for fast hash lookup: @@ -188,7 +188,7 @@ static struct entry *tstat_lookup(struct entry *entry, char *comm) prev = NULL; curr = *head; - spin_lock(&table_lock); + raw_spin_lock(&table_lock); /* * Make sure we have not raced with another CPU: */ @@ -215,7 +215,7 @@ static struct entry *tstat_lookup(struct entry *entry, char *comm) *head = curr; } out_unlock: - spin_unlock(&table_lock); + raw_spin_unlock(&table_lock); return curr; } |