diff mbox series

[062/118] mm/huge_memory.c: use head to check huge zero page

Message ID 20200131061429.Wq9p_I9Ss%akpm@linux-foundation.org (mailing list archive)
State New, archived
Headers show
Series [001/118] lib/test_bitmap: correct test data offsets for 32-bit | expand

Commit Message

Andrew Morton Jan. 31, 2020, 6:14 a.m. UTC 
From: Wei Yang <richardw.yang@linux.intel.com>
Subject: mm/huge_memory.c: use head to check huge zero page

The page could be a tail page, if this is the case, this BUG_ON will never
be triggered.

Link: http://lkml.kernel.org/r/20200110032610.26499-1-richardw.yang@linux.intel.com
Fixes: e9b61f19858a ("thp: reintroduce split_huge_page()")

Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/huge_memory.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

--- a/mm/huge_memory.c~mm-huge_memoryc-use-head-to-check-huge-zero-page
+++ a/mm/huge_memory.c
@@ -2712,7 +2712,7 @@  int split_huge_page_to_list(struct page
 	unsigned long flags;
 	pgoff_t end;
 
-	VM_BUG_ON_PAGE(is_huge_zero_page(page), page);
+	VM_BUG_ON_PAGE(is_huge_zero_page(head), head);
 	VM_BUG_ON_PAGE(!PageLocked(page), page);
 	VM_BUG_ON_PAGE(!PageCompound(page), page);