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/include/linux/pagevec.h b/include/linux/pagevec.h
index 87a2dfd..4f56e0a 100644
--- a/include/linux/pagevec.h
+++ b/include/linux/pagevec.h
@@ -40,16 +40,14 @@ static inline unsigned pagevec_lookup(struct pagevec *pvec,
 
 unsigned pagevec_lookup_range_tag(struct pagevec *pvec,
 		struct address_space *mapping, pgoff_t *index, pgoff_t end,
-		int tag, unsigned nr_pages);
+		int tag);
 unsigned pagevec_lookup_range_nr_tag(struct pagevec *pvec,
 		struct address_space *mapping, pgoff_t *index, pgoff_t end,
 		int tag, unsigned max_pages);
 static inline unsigned pagevec_lookup_tag(struct pagevec *pvec,
-		struct address_space *mapping, pgoff_t *index, int tag,
-		unsigned nr_pages)
+		struct address_space *mapping, pgoff_t *index, int tag)
 {
-	return pagevec_lookup_range_tag(pvec, mapping, index, (pgoff_t)-1, tag,
-					nr_pages);
+	return pagevec_lookup_range_tag(pvec, mapping, index, (pgoff_t)-1, tag);
 }
 
 static inline void pagevec_init(struct pagevec *pvec, int cold)