PIPE_BUF_FLAG_ATOMIC 185 fs/pipe.c buf->flags |= PIPE_BUF_FLAG_ATOMIC; PIPE_BUF_FLAG_ATOMIC 204 fs/pipe.c if (buf->flags & PIPE_BUF_FLAG_ATOMIC) { PIPE_BUF_FLAG_ATOMIC 205 fs/pipe.c buf->flags &= ~PIPE_BUF_FLAG_ATOMIC;