From: Pekka Enberg Remove a redundant fifo_poll() abstraction from fs/pipe.c and adds a big fat comment stating we set POLLERR for FIFOs too on Linux unlike most Unices. Signed-off-by: Pekka Enberg Cc: Manfred Spraul Signed-off-by: Andrew Morton --- fs/pipe.c | 13 +++++++------ 1 files changed, 7 insertions(+), 6 deletions(-) diff -puN fs/pipe.c~pipe-remove-redundant-fifo_poll-abstraction fs/pipe.c --- 25/fs/pipe.c~pipe-remove-redundant-fifo_poll-abstraction Mon Aug 29 16:02:30 2005 +++ 25-akpm/fs/pipe.c Mon Aug 29 16:02:30 2005 @@ -415,6 +415,10 @@ pipe_poll(struct file *filp, poll_table if (filp->f_mode & FMODE_WRITE) { mask |= (nrbufs < PIPE_BUFFERS) ? POLLOUT | POLLWRNORM : 0; + /* + * Most Unices do not set POLLERR for FIFOs but on Linux they + * behave exactly like pipes for poll(). + */ if (!PIPE_READERS(*inode)) mask |= POLLERR; } @@ -422,9 +426,6 @@ pipe_poll(struct file *filp, poll_table return mask; } -/* FIXME: most Unices do not set POLLERR for fifos */ -#define fifo_poll pipe_poll - static int pipe_release(struct inode *inode, int decr, int decw) { @@ -568,7 +569,7 @@ struct file_operations read_fifo_fops = .read = pipe_read, .readv = pipe_readv, .write = bad_pipe_w, - .poll = fifo_poll, + .poll = pipe_poll, .ioctl = pipe_ioctl, .open = pipe_read_open, .release = pipe_read_release, @@ -580,7 +581,7 @@ struct file_operations write_fifo_fops = .read = bad_pipe_r, .write = pipe_write, .writev = pipe_writev, - .poll = fifo_poll, + .poll = pipe_poll, .ioctl = pipe_ioctl, .open = pipe_write_open, .release = pipe_write_release, @@ -593,7 +594,7 @@ struct file_operations rdwr_fifo_fops = .readv = pipe_readv, .write = pipe_write, .writev = pipe_writev, - .poll = fifo_poll, + .poll = pipe_poll, .ioctl = pipe_ioctl, .open = pipe_rdwr_open, .release = pipe_rdwr_release, _