ceph: use get_user_pages_fast()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c
index 1a7c9a7..4098b17 100644
--- a/net/ceph/pagevec.c
+++ b/net/ceph/pagevec.c
@@ -24,9 +24,9 @@
 		return ERR_PTR(-ENOMEM);
 
 	while (got < num_pages) {
-		rc = get_user_pages_unlocked(
+		rc = get_user_pages_fast(
 		    (unsigned long)data + ((unsigned long)got * PAGE_SIZE),
-		    num_pages - got, pages + got, write_page ? FOLL_WRITE : 0);
+		    num_pages - got, write_page, pages + got);
 		if (rc < 0)
 			break;
 		BUG_ON(rc == 0);