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-rw-r--r--fs/pipe.c19
1 files changed, 12 insertions, 7 deletions
diff --git a/fs/pipe.c b/fs/pipe.c
index 25aa09f..66aa0b9 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -39,7 +39,11 @@ void pipe_wait(struct inode * inode)
{
DEFINE_WAIT(wait);
- prepare_to_wait(PIPE_WAIT(*inode), &wait, TASK_INTERRUPTIBLE);
+ /*
+ * Pipes are system-local resources, so sleeping on them
+ * is considered a noninteractive wait:
+ */
+ prepare_to_wait(PIPE_WAIT(*inode), &wait, TASK_INTERRUPTIBLE|TASK_NONINTERACTIVE);
up(PIPE_SEM(*inode));
schedule();
finish_wait(PIPE_WAIT(*inode), &wait);
@@ -415,6 +419,10 @@ 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 +430,6 @@ 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 +573,7 @@ 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 +585,7 @@ 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 +598,7 @@ 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,
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