mm: remove misleading alignment claims
authorMatthew Wilcox <mawilcox@microsoft.com>
Thu, 1 Feb 2018 00:18:51 +0000 (16:18 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 1 Feb 2018 01:18:38 +0000 (17:18 -0800)
commit4cf7c8bfb36f4b4dbc333bf844ea801d089f44f8
treef31e80c8cca8aefc43a0199d0715f8e953da9dab
parentca9c88c781b8e5d837068db6d1ca8e775fb7e154
mm: remove misleading alignment claims

The "third double word block" isn't on 32-bit systems.  The layout looks
like this:

unsigned long flags;
struct address_space *mapping
pgoff_t index;
atomic_t _mapcount;
atomic_t _refcount;

which is 32 bytes on 64-bit, but 20 bytes on 32-bit.  Nobody is trying to
use the fact that it's double-word aligned today, so just remove the
misleading claims.

Link: http://lkml.kernel.org/r/20171220155552.15884-4-willy@infradead.org
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/mm_types.h