author: Muchun Song <songmuchun@bytedance.com> 2021-09-07 19:55:55 -0700
committer: Linus Torvalds <torvalds@linux-foundation.org> 2021-09-08 11:50:23 -0700
commit: fe3df441ef885a75a3eff5e151ead1a92266d222
parent: 5ef5f810199f421cb6455aa018fb8f21151b4a16
Commit Summary:
Diffstat:
1 file changed, 4 insertions, 2 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index b9eb5c12f3fe..b2cebf35ffe7 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1230,11 +1230,13 @@ void page_add_file_rmap(struct page *page, bool compound)
nr_pages);
} else {
if (PageTransCompound(page) && page_mapping(page)) {
+ struct page *head = compound_head(page);
+
VM_WARN_ON_ONCE(!PageLocked(page));
- SetPageDoubleMap(compound_head(page));
+ SetPageDoubleMap(head);
if (PageMlocked(page))
- clear_page_mlock(compound_head(page));
+ clear_page_mlock(head);
}
if (!atomic_inc_and_test(&page->_mapcount))
goto out;