diff options
| author | Marco Elver <elver@google.com> | 2024-11-04 16:43:05 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2024-11-05 12:55:34 +0100 |
| commit | 1139c71df5ca29a36f08e3a08c7cee160db21ec1 (patch) | |
| tree | 18b67d4766453789609315d412a98371372de022 | |
| parent | 25cf4fbb596d730476afcc0fb87a9d708db14078 (diff) | |
time/sched_clock: Swap update_clock_read_data() latch writes
Swap the writes to the odd and even copies to make the writer critical
section look like all other seqcount_latch writers.
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20241104161910.780003-2-elver@google.com
| -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 68d6c1190ac7..85595fcf6aa2 100644 --- a/kernel/time/sched_clock.c +++ b/kernel/time/sched_clock.c @@ -119,9 +119,6 @@ unsigned long long notrace sched_clock(void) */ static void update_clock_read_data(struct clock_read_data *rd) { - /* update the backup (odd) copy with the new data */ - cd.read_data[1] = *rd; - /* steer readers towards the odd copy */ raw_write_seqcount_latch(&cd.seq); @@ -130,6 +127,9 @@ static void update_clock_read_data(struct clock_read_data *rd) /* switch readers back to the even copy */ raw_write_seqcount_latch(&cd.seq); + + /* update the backup (odd) copy with the new data */ + cd.read_data[1] = *rd; } /* |