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| author | Thomas Gleixner <tglx@linutronix.de> | 2009-08-19 11:26:09 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2009-08-19 11:42:48 +0200 |
| commit | d0981a1b21a03866c8da7f44e35e389c2e0d6061 (patch) | |
| tree | 7fe013c7de9adb1d4f20163669571fddfe09881c /mm/msync.c | |
| parent | 6ea41d252f35465a2308a4038a323b6b07de06f6 (diff) | |
| download | kernel_samsung_aries-d0981a1b21a03866c8da7f44e35e389c2e0d6061.zip kernel_samsung_aries-d0981a1b21a03866c8da7f44e35e389c2e0d6061.tar.gz kernel_samsung_aries-d0981a1b21a03866c8da7f44e35e389c2e0d6061.tar.bz2 | |
clocksource: Protect the watchdog rating changes with clocksource_mutex
Martin pointed out that commit 6ea41d2529 (clocksource: Call
clocksource_change_rating() outside of watchdog_lock) has a
theoretical reference count problem. The calls to
clocksource_change_rating() are now done outside of the clocksource
mutex and outside of the watchdog lock. A concurrent
clocksource_unregister() could remove the clock.
Split out the code which changes the rating from
clocksource_change_rating() into __clocksource_change_rating().
Protect the clocksource_watchdog_work() code sequence with the
clocksource_mutex() and call __clocksource_change_rating().
LKML-Reference: <alpine.LFD.2.00.0908171038420.2782@localhost.localdomain>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'mm/msync.c')
0 files changed, 0 insertions, 0 deletions