pipe_double_lock 1549 fs/splice.c    	pipe_double_lock(ipipe, opipe);
pipe_double_lock 1659 fs/splice.c    	pipe_double_lock(ipipe, opipe);
pipe_double_lock  163 include/linux/pipe_fs_i.h void pipe_double_lock(struct pipe_inode_info *, struct pipe_inode_info *);