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| author | Ingo Molnar <mingo@elte.hu> | 2006-12-06 23:40:50 -0500 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-07 11:39:46 -0500 |
| commit | 70e4506765602cca047cfa31933836e354c61a63 (patch) | |
| tree | b490e5066404eab1ec7cf5147521c0bd53226b07 /Documentation/rt-mutex.txt | |
| parent | 72be2ccfff0e0e332b32f7ef8372890e39b7c4cb (diff) | |
[PATCH] lockdep: register_lock_class() fix
The hash_lock must only ever be taken with irqs disabled. This happens in
all the important places, except one codepath: register_lock_class(). The
race should trigger rarely because register_lock_class() is quite rare and
single-threaded (happens during init most of the time).
The fix is to disable irqs.
( bug found live in -rt: there preemption is alot more agressive and
preempting with the hash-lock held caused a lockup.)
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation/rt-mutex.txt')
0 files changed, 0 insertions, 0 deletions