vfs: do bulk POLL* -> EPOLL* replacement

This is the mindless scripted replacement of kernel use of POLL*
variables as described by Al, done by this script:

    for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
        L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
        for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
    done

with de-mangling cleanups yet to come.

NOTE! On almost all architectures, the EPOLL* constants have the same
values as the POLL* constants do.  But they keyword here is "almost".
For various bad reasons they aren't the same, and epoll() doesn't
actually work quite correctly in some cases due to this on Sparc et al.

The next patch from Al will sort out the final differences, and we
should be all done.

Scripted-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/media/common/videobuf2/videobuf2-core.c

@@ -2038,9 +2038,9 @@ __poll_t vb2_core_poll(struct vb2_queue *q, struct file *file,
 	struct vb2_buffer *vb = NULL;
 	unsigned long flags;
 
-	if (!q->is_output && !(req_events & (POLLIN | POLLRDNORM)))
+	if (!q->is_output && !(req_events & (EPOLLIN | EPOLLRDNORM)))
 		return 0;
-	if (q->is_output && !(req_events & (POLLOUT | POLLWRNORM)))
+	if (q->is_output && !(req_events & (EPOLLOUT | EPOLLWRNORM)))
 		return 0;
 
 	/*
@@ -2048,18 +2048,18 @@ __poll_t vb2_core_poll(struct vb2_queue *q, struct file *file,
 	 */
 	if (q->num_buffers == 0 && !vb2_fileio_is_active(q)) {
 		if (!q->is_output && (q->io_modes & VB2_READ) &&
-				(req_events & (POLLIN | POLLRDNORM))) {
+				(req_events & (EPOLLIN | EPOLLRDNORM))) {
 			if (__vb2_init_fileio(q, 1))
-				return POLLERR;
+				return EPOLLERR;
 		}
 		if (q->is_output && (q->io_modes & VB2_WRITE) &&
-				(req_events & (POLLOUT | POLLWRNORM))) {
+				(req_events & (EPOLLOUT | EPOLLWRNORM))) {
 			if (__vb2_init_fileio(q, 0))
-				return POLLERR;
+				return EPOLLERR;
 			/*
 			 * Write to OUTPUT queue can be done immediately.
 			 */
-			return POLLOUT | POLLWRNORM;
+			return EPOLLOUT | EPOLLWRNORM;
 		}
 	}
 
@@ -2068,24 +2068,24 @@ __poll_t vb2_core_poll(struct vb2_queue *q, struct file *file,
 	 * error flag is set.
 	 */
 	if (!vb2_is_streaming(q) || q->error)
-		return POLLERR;
+		return EPOLLERR;
 
 	/*
 	 * If this quirk is set and QBUF hasn't been called yet then
-	 * return POLLERR as well. This only affects capture queues, output
+	 * return EPOLLERR as well. This only affects capture queues, output
 	 * queues will always initialize waiting_for_buffers to false.
 	 * This quirk is set by V4L2 for backwards compatibility reasons.
 	 */
 	if (q->quirk_poll_must_check_waiting_for_buffers &&
-	    q->waiting_for_buffers && (req_events & (POLLIN | POLLRDNORM)))
-		return POLLERR;
+	    q->waiting_for_buffers && (req_events & (EPOLLIN | EPOLLRDNORM)))
+		return EPOLLERR;
 
 	/*
 	 * For output streams you can call write() as long as there are fewer
 	 * buffers queued than there are buffers available.
 	 */
 	if (q->is_output && q->fileio && q->queued_count < q->num_buffers)
-		return POLLOUT | POLLWRNORM;
+		return EPOLLOUT | EPOLLWRNORM;
 
 	if (list_empty(&q->done_list)) {
 		/*
@@ -2093,7 +2093,7 @@ __poll_t vb2_core_poll(struct vb2_queue *q, struct file *file,
 		 * return immediately. DQBUF will return -EPIPE.
 		 */
 		if (q->last_buffer_dequeued)
-			return POLLIN | POLLRDNORM;
+			return EPOLLIN | EPOLLRDNORM;
 
 		poll_wait(file, &q->done_wq, wait);
 	}
@@ -2110,8 +2110,8 @@ __poll_t vb2_core_poll(struct vb2_queue *q, struct file *file,
 	if (vb && (vb->state == VB2_BUF_STATE_DONE
 			|| vb->state == VB2_BUF_STATE_ERROR)) {
 		return (q->is_output) ?
-				POLLOUT | POLLWRNORM :
-				POLLIN | POLLRDNORM;
+				EPOLLOUT | EPOLLWRNORM :
+				EPOLLIN | EPOLLRDNORM;
 	}
 	return 0;
 }

drivers/media/common/videobuf2/videobuf2-v4l2.c

@@ -658,7 +658,7 @@ int vb2_queue_init(struct vb2_queue *q)
 			== V4L2_BUF_FLAG_TIMESTAMP_COPY;
 	/*
 	 * For compatibility with vb1: if QBUF hasn't been called yet, then
-	 * return POLLERR as well. This only affects capture queues, output
+	 * return EPOLLERR as well. This only affects capture queues, output
 	 * queues will always initialize waiting_for_buffers to false.
 	 */
 	q->quirk_poll_must_check_waiting_for_buffers = true;
@@ -683,8 +683,8 @@ __poll_t vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait)
 		struct v4l2_fh *fh = file->private_data;
 
 		if (v4l2_event_pending(fh))
-			res = POLLPRI;
-		else if (req_events & POLLPRI)
+			res = EPOLLPRI;
+		else if (req_events & EPOLLPRI)
 			poll_wait(file, &fh->wait, wait);
 	}
 
@@ -921,7 +921,7 @@ __poll_t vb2_fop_poll(struct file *file, poll_table *wait)
 	WARN_ON(!lock);
 
 	if (lock && mutex_lock_interruptible(lock))
-		return POLLERR;
+		return EPOLLERR;
 
 	fileio = q->fileio;