background_work_lock 477 drivers/md/dm-cache-target.c struct rw_semaphore background_work_lock; background_work_lock 1120 drivers/md/dm-cache-target.c down_write(&cache->background_work_lock); background_work_lock 1127 drivers/md/dm-cache-target.c up_write(&cache->background_work_lock); background_work_lock 1136 drivers/md/dm-cache-target.c r = down_read_trylock(&cache->background_work_lock); background_work_lock 1145 drivers/md/dm-cache-target.c up_read(&cache->background_work_lock); background_work_lock 2652 drivers/md/dm-cache-target.c init_rwsem(&cache->background_work_lock);