timekeeping: Split timekeeper_lock into lock and seqcount

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We want to shorten the seqcount write hold time. So split the seqlock
into a lock and a seqcount.

Open code the seqwrite_lock in the places which matter and drop the
sequence counter update where it's pointless.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
[jstultz: Merge fixups from CLOCK_TAI collisions]
Signed-off-by: John Stultz <john.stultz@linaro.org>

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Thomas Gleixner 2013-02-21 22:51:38 +00:00 • committed by John Stultz

parent 7e40672d93

commit 9a7a71b1d0

1 changed files with 73 additions and 59 deletions

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kernel/time/timekeeping.c

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