mm: remove nr_pages argument from pagevec_lookup_{,range}_tag()

All users of pagevec_lookup() and pagevec_lookup_range() now pass
PAGEVEC_SIZE as a desired number of pages.  Just drop the argument.

Link: http://lkml.kernel.org/r/20171009151359.31984-15-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 0fc2987..26c682d 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1162,8 +1162,7 @@
 			index = 0;
 			while ((index <= end) &&
 			       (nr = pagevec_lookup_tag(&pvec, mapping, &index,
-							PAGECACHE_TAG_WRITEBACK,
-							PAGEVEC_SIZE))) {
+						PAGECACHE_TAG_WRITEBACK))) {
 				for (i = 0; i < nr; i++) {
 					page = pvec.pages[i];
 					if (page_snap_context(page) != snapc)