pvr2fs: use get_user_pages_fast()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

drivers/video/fbdev/pvr2fb.c

@@ -686,9 +686,7 @@ static ssize_t pvr2fb_write(struct fb_info *info, const char *buf,
 	if (!pages)
 		return -ENOMEM;
 
-	ret = get_user_pages_unlocked((unsigned long)buf, nr_pages, pages,
-			FOLL_WRITE);
-
+	ret = get_user_pages_fast((unsigned long)buf, nr_pages, true, pages);
 	if (ret < nr_pages) {
 		nr_pages = ret;
 		ret = -EINVAL;