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authorEric Paris <eparis@redhat.com>2009-03-23 18:22:09 +0100
committerIngo Molnar <mingo@elte.hu>2009-04-06 09:30:26 +0200
commit9ab772cd535c4b256a577eae516f9c7462346b2d (patch)
tree55af69a2eaeaa952f447b74cce74eee9f82cfaf9 /kernel/mutex.c
parent37d81828385f8ff823caaaf1a83e72d065b6cfa1 (diff)
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mutex: add atomic_dec_and_mutex_lock()
Much like the atomic_dec_and_lock() function in which we take an hold a spin_lock if we drop the atomic to 0 this function takes and holds the mutex if we dec the atomic to 0. Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Orig-LKML-Reference: <20090323172417.410913479@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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