The patch titled
Subject: mm-distinguish-vmalloc-pages-fix
has been added to the -mm tree. Its filename is
mm-distinguish-vmalloc-pages-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-distinguish-vmalloc-pages-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-distinguish-vmalloc-pages-fix.patch
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------------------------------------------------------
From: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Subject: mm-distinguish-vmalloc-pages-fix
handle MAPPING_* cookies in page_mapping()
Link: http://lkml.kernel.org/r/20180522201958.GC1237@xxxxxxxxxxxxxxxxxxxxxx
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Jérôme Glisse <jglisse@xxxxxxxxxx>
Cc: "Kirill A . Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Lai Jiangshan <jiangshanlai@xxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/util.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN mm/util.c~mm-distinguish-vmalloc-pages-fix mm/util.c
--- a/mm/util.c~mm-distinguish-vmalloc-pages-fix
+++ a/mm/util.c
@@ -512,6 +512,8 @@ struct address_space *page_mapping(struc
mapping = page->mapping;
if ((unsigned long)mapping & PAGE_MAPPING_ANON)
return NULL;
+ if ((unsigned long)mapping < PAGE_SIZE)
+ return NULL;
return (void *)((unsigned long)mapping & ~PAGE_MAPPING_FLAGS);
}
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-distinguish-vmalloc-pages-fix.patch
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