diff options
| author | Jarek Poplawski <jarkao2@o2.pl> | 2007-02-10 01:44:58 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-11 10:51:26 -0800 |
| commit | 381a229209aa6f7f72375797b7bcfcfe2ae6fcbb (patch) | |
| tree | bbd92afe1437ac77084c6ba3485f7f5a988dd673 /kernel/lockdep_proc.c | |
| parent | 898552c9d807fe59f3ecaf9c300c109358375c12 (diff) | |
[PATCH] lockdep: more unlock-on-error fixes
- returns after DEBUG_LOCKS_WARN_ON added in 3 places
- debug_locks checking after lookup_chain_cache() added in
__lock_acquire()
- locking for testing and changing global variable max_lockdep_depth
added in __lock_acquire()
From: Ingo Molnar <mingo@elte.hu>
My __acquire_lock() cleanup introduced a locking bug: on SMP systems we'd
release a non-owned graph lock. Fix this by moving the graph unlock back,
and by leaving the max_lockdep_depth variable update possibly racy. (we
dont care, it's just statistics)
Also add some minimal debugging code to graph_unlock()/graph_lock(),
which caught this locking bug.
Signed-off-by: Jarek Poplawski <jarkao2@o2.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/lockdep_proc.c')
0 files changed, 0 insertions, 0 deletions