We want only pages from given range in filemap_range_has_page(),
furthermore we want at most a single page. So use find_get_pages_range()
instead of pagevec_lookup() and remove unnecessary code.
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
mm/filemap.c | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index b02be926a115..871c974f0bb3 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -402,8 +402,7 @@ bool filemap_range_has_page(struct address_space *mapping,
{
pgoff_t index = start_byte >> PAGE_SHIFT;
pgoff_t end = end_byte >> PAGE_SHIFT;
- struct pagevec pvec;
- bool ret;
+ struct page *page;
if (end_byte < start_byte)
return false;
@@ -411,12 +410,10 @@ bool filemap_range_has_page(struct address_space *mapping,
if (mapping->nrpages == 0)
return false;
- pagevec_init(&pvec, 0);
- if (!pagevec_lookup(&pvec, mapping, &index, 1))
+ if (!find_get_pages_range(mapping, &index, end, 1, &page))
return false;
- ret = (pvec.pages[0]->index <= end);
- pagevec_release(&pvec);
- return ret;
+ put_page(page);
+ return true;
}
EXPORT_SYMBOL(filemap_range_has_page);
--
2.12.3
--
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