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| author |   Michal Hocko <mhocko@suse.cz> | 2013-09-24 15:27:29 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-24 17:00:25 -0700 |
| commit | 359e6fab6600562073162348cd4c18c5958296d8 (patch) | |
| tree | a7cd07315603004dc2b00311df8cfa259b863feb /include/linux/smp.h | |
| parent | Linux 3.12-rc2 (diff) | |
| download | linux-dev-359e6fab6600562073162348cd4c18c5958296d8.tar.xz linux-dev-359e6fab6600562073162348cd4c18c5958296d8.zip | |
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 'include/linux/smp.h')
0 files changed, 0 insertions, 0 deletions