V4L/DVB: v4l videobuf: remove unused is_mmapped field

Thanks to Pawel Osciak for noticing this.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/videobuf-core.c

@@ -321,8 +321,6 @@ static int __videobuf_mmap_free(struct videobuf_queue *q)
 		if (q->bufs[i] && q->bufs[i]->map)
 			return -EBUSY;
 
-	q->is_mmapped = 0;
-
 	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
 		if (NULL == q->bufs[i])
 			continue;
@@ -1089,7 +1087,6 @@ int videobuf_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma)
 
 	mutex_lock(&q->vb_lock);
 	retval = CALL(q, mmap_mapper, q, vma);
-	q->is_mmapped = 1;
 	mutex_unlock(&q->vb_lock);
 
 	return retval;

include/media/videobuf-core.h

@@ -166,7 +166,6 @@ struct videobuf_queue {
 
 	unsigned int               streaming:1;
 	unsigned int               reading:1;
-	unsigned int		   is_mmapped:1;
 
 	/* capture via mmap() + ioctl(QBUF/DQBUF) */
 	struct list_head           stream;