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(parent: 37d8182) | patch
mutex: add atomic_dec_and_mutex_lock()
authorEric Paris <eparis@redhat.com>
Mon, 23 Mar 2009 17:22:09 +0000 (18:22 +0100)
committerIngo Molnar <mingo@elte.hu>
Mon, 6 Apr 2009 07:30:26 +0000 (09:30 +0200)
commit9ab772cd535c4b256a577eae516f9c7462346b2d
tree55af69a2eaeaa952f447b74cce74eee9f82cfaf9tree | snapshot (tar.gz zip)
parent37d81828385f8ff823caaaf1a83e72d065b6cfa1commit | diff
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>
include/linux/mutex.h diff | blob | blame | history