diff options
| author | John Stultz <[email protected]> | 2014-01-02 15:11:14 -0800 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2014-01-12 10:14:00 +0100 |
| commit | 7a06c41cbec33c6dbe7eec575c61986122617408 (patch) | |
| tree | 7b97849c95bbc76378e9136b2f8016be9e413e0d | |
| parent | 0c3351d451ae2fa438d5d1ed719fc43354fbffbb (diff) | |
sched_clock: Disable seqlock lockdep usage in sched_clock()
Unfortunately the seqlock lockdep enablement can't be used
in sched_clock(), since the lockdep infrastructure eventually
calls into sched_clock(), which causes a deadlock.
Thus, this patch changes all generic sched_clock() usage
to use the raw_* methods.
Acked-by: Linus Torvalds <[email protected]>
Reviewed-by: Stephen Boyd <[email protected]>
Reported-by: Krzysztof Hałasa <[email protected]>
Signed-off-by: John Stultz <[email protected]>
Cc: Uwe Kleine-König <[email protected]>
Cc: Willy Tarreau <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | kernel/time/sched_clock.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/time/sched_clock.c b/kernel/time/sched_clock.c index 68b799375981..0abb36464281 100644 --- a/kernel/time/sched_clock.c +++ b/kernel/time/sched_clock.c @@ -74,7 +74,7 @@ unsigned long long notrace sched_clock(void) return cd.epoch_ns; do { - seq = read_seqcount_begin(&cd.seq); + seq = raw_read_seqcount_begin(&cd.seq); epoch_cyc = cd.epoch_cyc; epoch_ns = cd.epoch_ns; } while (read_seqcount_retry(&cd.seq, seq)); @@ -99,10 +99,10 @@ static void notrace update_sched_clock(void) cd.mult, cd.shift); raw_local_irq_save(flags); - write_seqcount_begin(&cd.seq); + raw_write_seqcount_begin(&cd.seq); cd.epoch_ns = ns; cd.epoch_cyc = cyc; - write_seqcount_end(&cd.seq); + raw_write_seqcount_end(&cd.seq); raw_local_irq_restore(flags); } |