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author | Tejun Heo <tj@kernel.org> | 2013-01-23 09:31:01 -0800 |
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committer | Tejun Heo <tj@kernel.org> | 2013-01-23 09:31:01 -0800 |
commit | c14afb82ffff5903a701a9fb737ac20f36d1f755 (patch) | |
tree | 304dcc7b1d7b9a5f564f7e978228e61ef41fbef2 /kernel/rwsem.c | |
parent | 0fdff3ec6d87856cdcc99e69cf42143fdd6c56b4 (diff) | |
parent | 1d8549085377674224bf30a368284c391a3ce40e (diff) | |
download | blackbird-op-linux-c14afb82ffff5903a701a9fb737ac20f36d1f755.tar.gz blackbird-op-linux-c14afb82ffff5903a701a9fb737ac20f36d1f755.zip |
Merge branch 'master' into for-3.9-async
To receive f56c3196f251012de9b3ebaff55732a9074fdaae ("async: fix
__lowest_in_progress()").
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/rwsem.c')
-rw-r--r-- | kernel/rwsem.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/rwsem.c b/kernel/rwsem.c index 6850f53e02d8..b3c6c3fcd847 100644 --- a/kernel/rwsem.c +++ b/kernel/rwsem.c @@ -116,6 +116,16 @@ void down_read_nested(struct rw_semaphore *sem, int subclass) EXPORT_SYMBOL(down_read_nested); +void _down_write_nest_lock(struct rw_semaphore *sem, struct lockdep_map *nest) +{ + might_sleep(); + rwsem_acquire_nest(&sem->dep_map, 0, 0, nest, _RET_IP_); + + LOCK_CONTENDED(sem, __down_write_trylock, __down_write); +} + +EXPORT_SYMBOL(_down_write_nest_lock); + void down_write_nested(struct rw_semaphore *sem, int subclass) { might_sleep(); |