down_read_nested  113 fs/jfs/jfs_incore.h 	down_read_nested(&JFS_IP(ip)->rdwrlock, subclass)
down_read_nested   43 fs/xfs/linux-2.6/mrlock.h 	down_read_nested(&mrp->mr_lock, subclass);
down_read_nested   74 include/linux/rwsem.h extern void down_read_nested(struct rw_semaphore *sem, int subclass);