zoran: don't bother with struct file * in zoran_map

all we need it for is file->private_data, which is assign-once, already
assigned by that point and, incidentally, its value is already in use
by zoran ->mmap() anyway.  So just store that pointer instead...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

drivers/media/video/zoran/zoran.h

@@ -172,8 +172,10 @@ struct zoran_jpg_settings {
 	struct v4l2_jpegcompression jpg_comp;	/* JPEG-specific capture settings */
 };
 
+struct zoran_fh;
+
 struct zoran_mapping {
-	struct file *file;
+	struct zoran_fh *fh;
 	int count;
 };
 

drivers/media/video/zoran/zoran_driver.c

@@ -2811,7 +2811,7 @@ static void
 zoran_vm_close (struct vm_area_struct *vma)
 {
 	struct zoran_mapping *map = vma->vm_private_data;
-	struct zoran_fh *fh = map->file->private_data;
+	struct zoran_fh *fh = map->fh;
 	struct zoran *zr = fh->zr;
 	int i;
 
@@ -2938,7 +2938,7 @@ zoran_mmap (struct file           *file,
 		res = -ENOMEM;
 		goto mmap_unlock_and_return;
 	}
-	map->file = file;
+	map->fh = fh;
 	map->count = 1;
 
 	vma->vm_ops = &zoran_vm_ops;