mm: add tail private fields to struct folio

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Because THP_SWAP uses page->private for each page, we must not use the
space which overlaps that field for anything which would conflict with
that.  We avoid the conflict on 32-bit systems by disallowing THP_SWAP on
32-bit.

Link: https://lkml.kernel.org/r/20230816151201.3655946-13-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

...

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Matthew Wilcox (Oracle) 2023-08-16 16:12:00 +01:00 • committed by Andrew Morton

parent 6199277baf

commit b10ff04dc0

1 changed files with 13 additions and 1 deletions

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14

include/linux/mm_types.h

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