tick/timekeeping: Call update_wall_time outside the jiffies lock

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Since the xtime lock was split into the timekeeping lock and
the jiffies lock, we no longer need to call update_wall_time()
while holding the jiffies lock.

Thus, this patch splits update_wall_time() out from do_timer().

This allows us to get away from calling clock_was_set_delayed()
in update_wall_time() and instead use the standard clock_was_set()
call that previously would deadlock, as it causes the jiffies lock
to be acquired.

Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>

...

This commit is contained in:

John Stultz 2013-12-12 13:10:55 -08:00

parent 6fdda9a9c5

commit 47a1b79630

4 changed files with 7 additions and 15 deletions

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1

kernel/time/tick-common.c

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1

kernel/time/tick-internal.h

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1

kernel/time/tick-sched.c

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19

kernel/time/timekeeping.c

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