Unforunately the seqlock lockdep enablmenet 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.
Cc: Krzysztof Hałasa <khal...@piap.pl>
Cc: Uwe Kleine-König <u.kleine-koe...@pengutronix.de>
Cc: Willy Tarreau <w...@1wt.eu>
Cc: Ingo Molnar <mi...@kernel.org>,
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Stephen Boyd <sb...@codeaurora.org>
Cc: Linus Torvalds <torva...@linux-foundation.org>
Cc: linux-arm-ker...@lists.infradead.org
Reported-by: Krzysztof Hałasa <khal...@piap.pl>
Signed-off-by: John Stultz <john.stu...@linaro.org>
---
kernel/time/sched_clock.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/time/sched_clock.c b/kernel/time/sched_clock.c
index 68b7993..0abb364 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);
}
--
1.8.3.2
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