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| author | Ahmed S. Darwish <a.darwish@linutronix.de> | 2020-08-27 13:40:40 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-09-10 11:19:29 +0200 |
| commit | a690ed07353ec45f056b0a6f87c23a12a59c030d (patch) | |
| tree | 2951501cb8a5869d891a28b73a3a86cf0a3b5367 /kernel/time | |
| parent | seqlock: Introduce seqcount_latch_t (diff) | |
| download | linux-a690ed07353ec45f056b0a6f87c23a12a59c030d.tar.xz linux-a690ed07353ec45f056b0a6f87c23a12a59c030d.zip | |
time/sched_clock: Use seqcount_latch_t
Latch sequence counters have unique read and write APIs, and thus
seqcount_latch_t was recently introduced at seqlock.h.
Use that new data type instead of plain seqcount_t. This adds the
necessary type-safety and ensures only latching-safe seqcount APIs are
to be used.
Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200827114044.11173-5-a.darwish@linutronix.de
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/sched_clock.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/time/sched_clock.c b/kernel/time/sched_clock.c index 8c6b5febd7a0..0642013dace4 100644 --- a/kernel/time/sched_clock.c +++ b/kernel/time/sched_clock.c @@ -35,7 +35,7 @@ * into a single 64-byte cache line. */ struct clock_data { - seqcount_t seq; + seqcount_latch_t seq; struct clock_read_data read_data[2]; ktime_t wrap_kt; unsigned long rate; @@ -76,7 +76,7 @@ struct clock_read_data *sched_clock_read_begin(unsigned int *seq) int sched_clock_read_retry(unsigned int seq) { - return read_seqcount_retry(&cd.seq, seq); + return read_seqcount_latch_retry(&cd.seq, seq); } unsigned long long notrace sched_clock(void) |