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mm: make pagevec_lookup() update index

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Make pagevec_lookup() (and underlying find_get_pages()) update index to
the next page where iteration should continue.  Most callers want this
and also pagevec_lookup_tag() already does this.

Link: http://lkml.kernel.org/r/20170726114704.7626-3-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jan Kara
2017-09-06 16:21:18 -07:00
committed by Linus Torvalds
parent 26b433d0da
commit d72dc8a25a
11 changed files with 32 additions and 37 deletions
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5
mm/swap.c
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@@ -957,12 +957,13 @@ void pagevec_remove_exceptionals(struct pagevec *pvec)
* reference against the pages in @pvec.
*
* The search returns a group of mapping-contiguous pages with ascending
* indexes. There may be holes in the indices due to not-present pages.
* indexes. There may be holes in the indices due to not-present pages. We
* also update @start to index the next page for the traversal.
*
* pagevec_lookup() returns the number of pages which were found.
*/
unsigned pagevec_lookup(struct pagevec *pvec, struct address_space *mapping,
pgoff_t start, unsigned nr_pages)
pgoff_t *start, unsigned nr_pages)
{
pvec->nr = find_get_pages(mapping, start, nr_pages, pvec->pages);
return pagevec_count(pvec);