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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2011-06-06 12:32:43 +0200
committerIngo Molnar <mingo@elte.hu>2011-06-07 12:25:50 +0200
commitf2513cde93f0957d5dc6c09bc24b0cccd27d8e1d (patch)
treeb461cb0836170eb555b20818802c121c79e76d33 /kernel/freezer.c
parentf339b9dc1f03591761d5d930800db24bc0eda1e1 (diff)
lockdep: Fix lock_is_held() on recursion
The main lock_is_held() user is lockdep_assert_held(), avoid false assertions in lockdep_off() sections by unconditionally reporting the lock is taken. [ the reason this is important is a lockdep_assert_held() in ttwu() which triggers a warning under lockdep_off() as in printk() which can trigger another wakeup and lock up due to spinlock recursion, as reported and heroically debugged by Arne Jansen ] Reported-and-tested-by: Arne Jansen <lists@die-jansens.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: <stable@kernel.org> Link: http://lkml.kernel.org/r/1307398759.2497.966.camel@laptop Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/freezer.c')
0 files changed, 0 insertions, 0 deletions