time: Fix change_clocksource locking
authorJohn Stultz <john.stultz@linaro.org>
Wed, 14 Mar 2012 23:38:15 +0000 (16:38 -0700)
committerJohn Stultz <john.stultz@linaro.org>
Fri, 16 Mar 2012 01:17:54 +0000 (18:17 -0700)
commitf695cf94837de53864180400cbac42cfa370426f
tree9bb91a9b8c5a1291a083a37e790da00d477b18f8
parenta939e817aa7e199d2fff05a67cb745be32dd5c2d
time: Fix change_clocksource locking

change_clocksource() fails to grab locks or call timekeeping_update(),
which leaves a race window for time inconsistencies.

This adds proper locking and a call to timekeeping_update() to fix this.

CC: Andy Lutomirski <luto@amacapital.net>
CC: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
kernel/time/timekeeping.c