tree 2ef8c9431f15cae6f243482cbe1cf9f11ae60082
parent 534e3adbd22efa327e6ff27cf2d8ebaad8382ecd
author Hillf Danton <dhillf@gmail.com> 1303943215 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1304015301 -0700

kernel/watchdog.c: disable nmi perf event in the error path of enabling watchdog

In corner cases where softlockup watchdog is not setup successfully, the
relevant nmi perf event for hardlockup watchdog could be disabled, then
the status of the underlying hardware remains unchanged.

Also, if the kthread doesn't start then the hrtimer won't run and the
hardlockup detector will falsely fire.

Signed-off-by: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>