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authorIngo Molnar <mingo@elte.hu>2005-08-05 23:05:27 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2005-08-05 15:56:41 -0700
commit00a5dfdb93f74e4d95fb0d83c890728e331f8810 (patch)
treef1d1043d7d02ad6bde3b158807b28bcfdafa21f6 /lib
parentba02508248e90a9d696aebd18b48a3290235b53c (diff)
[PATCH] Fix semundo lock leakage
semundo->lock can leak if semundo->refcount goes from 2 to 1 while another thread has it locked. This causes major problems for PREEMPT kernels. The simplest fix for now is to undo the single-thread optimization. This bug was found via relentless testing by Dominik Karall. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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