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>

fs/f2fs/data.c

@@ -1670,7 +1670,7 @@ retry:
 		int i;
 
 		nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
-				tag, PAGEVEC_SIZE);
+				tag);
 		if (nr_pages == 0)
 			break;