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authorPekka Enberg <penberg@cs.helsinki.fi>2005-09-06 15:17:48 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-07 16:57:35 -0700
commit5e5d7a22292613e55da8e91d75bcc062fd861f41 (patch)
tree052ad4b7bfcc8fcd21a94acca58393a963bd3b06
parent9c45817f41af987277353e463c78a1c6beb37da2 (diff)
downloadlinux-sh-5e5d7a22292613e55da8e91d75bcc062fd861f41.tar.gz
[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 <penberg@cs.helsinki.fi> Cc: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/pipe.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/fs/pipe.c b/fs/pipe.c
index 25aa09f9d09d..2c7a23dde2d8 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,