Use pagevec_lookup_range_tag() in write_cache_pages() as it is
interested only in pages from given range. Remove unnecessary code
resulting from this.
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
mm/page-writeback.c | 20 ++------------------
1 file changed, 2 insertions(+), 18 deletions(-)
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 0b9c5cbe8eba..43b18e185fbd 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2194,30 +2194,14 @@ int write_cache_pages(struct address_space *mapping,
while (!done && (index <= end)) {
int i;
- nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag,
- min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
+ nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
+ tag, PAGEVEC_SIZE);
if (nr_pages == 0)
break;
for (i = 0; i < nr_pages; i++) {
struct page *page = pvec.pages[i];
- /*
- * At this point, the page may be truncated or
- * invalidated (changing page->mapping to NULL), or
- * even swizzled back from swapper_space to tmpfs file
- * mapping. However, page->index will not change
- * because we have a reference on the page.
- */
- if (page->index > end) {
- /*
- * can't be range_cyclic (1st pass) because
- * end == -1 in that case.
- */
- done = 1;
- break;
- }
-
done_index = page->index;
lock_page(page);
--
2.12.3
