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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-30 12:35:15 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-30 12:35:15 -0700 |
| commit | fa7eadab4b4aec0139d2429e6f8d13375ff8a658 (patch) | |
| tree | 91b4ef421d415b782ff54cc89296268903fc9552 | |
| parent | bc7d352c5e76c74c628a39b99777a1bdddde5e81 (diff) | |
| parent | fd6be105b883244127a734ac9f14ae94a022dcc0 (diff) | |
| download | lwn-fa7eadab4b4aec0139d2429e6f8d13375ff8a658.tar.gz lwn-fa7eadab4b4aec0139d2429e6f8d13375ff8a658.zip | |
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
mutex: Fix optimistic spinning vs. BKL
| -rw-r--r-- | kernel/mutex.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/mutex.c b/kernel/mutex.c index 632f04c57d82..4c0b7b3e6d2e 100644 --- a/kernel/mutex.c +++ b/kernel/mutex.c @@ -172,6 +172,13 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass, struct thread_info *owner; /* + * If we own the BKL, then don't spin. The owner of + * the mutex might be waiting on us to release the BKL. + */ + if (unlikely(current->lock_depth >= 0)) + break; + + /* * If there's an owner, wait for it to either * release the lock or go to sleep. */ |