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authorMichal Hocko <mhocko@suse.cz>2013-09-25 02:27:29 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-25 04:00:25 +0400
commit359e6fab6600562073162348cd4c18c5958296d8 (patch)
treea7cd07315603004dc2b00311df8cfa259b863feb /net/unix/af_unix.c
parent4a10c2ac2f368583138b774ca41fac4207911983 (diff)
downloadlinux-359e6fab6600562073162348cd4c18c5958296d8.tar.xz
watchdog: update watchdog attributes atomically
proc_dowatchdog doesn't synchronize multiple callers which might lead to confusion when two parallel callers might confuse watchdog_enable_all_cpus resp watchdog_disable_all_cpus (eg watchdog gets enabled even if watchdog_thresh was set to 0 already). This patch adds a local mutex which synchronizes callers to the sysctl handler. Signed-off-by: Michal Hocko <mhocko@suse.cz> Cc: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Don Zickus <dzickus@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net/unix/af_unix.c')
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