Commit 536f4217 authored by Wei Yang's avatar Wei Yang Committed by Linus Torvalds
Browse files

mm: page->mapping folio->mapping should have the same offset 

As with the other members of folio, the offset of page->mapping and
folio->mapping must be the same.  The compile-time check was
inadvertently removed during development.  Add it back.

[willy@infradead.org: changelog redo]

Link: https://lkml.kernel.org/r/20220104011734.21714-1-richard.weiyang@gmail.com


Signed-off-by: default avatarWei Yang <richard.weiyang@gmail.com>
Reviewed-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 61e28cf0

include/linux/mm_types.h

+1 −0
Original line number Diff line number Diff line
@@ -261,6 +261,7 @@ static_assert(sizeof(struct page) == sizeof(struct folio)); 
	static_assert(offsetof(struct page, pg) == offsetof(struct folio, fl))

FOLIO_MATCH(flags, flags);

FOLIO_MATCH(lru, lru);

FOLIO_MATCH(mapping, mapping);

FOLIO_MATCH(compound_head, lru);

FOLIO_MATCH(index, index);

FOLIO_MATCH(private, private);