From: Pekka Enberg Date: Tue, 6 Sep 2005 22:17:48 +0000 (-0700) Subject: [PATCH] pipe: remove redundant fifo_poll abstraction X-Git-Tag: v2.6.14-rc1~662 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5e5d7a22292613e55da8e91d75bcc062fd861f41;p=linux-2.6 [PATCH] pipe: remove redundant fifo_poll abstraction 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 Signed-off-by: Linus Torvalds --- diff --git a/fs/pipe.c b/fs/pipe.c index 25aa09f9d0..2c7a23dde2 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -415,6 +415,10 @@ pipe_poll(struct file *filp, poll_table *wait) 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 *wait) 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,