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From: Wei Yang <richard.weiyang@gmail.com>
To: peterz@infradead.org, akpm@linux-foundation.org, vbabka@suse.cz,
	willy@infradead.org, will@kernel.org, linyunsheng@huawei.com,
	richard.weiyang@gmail.com, aarcange@redhat.com,
	feng.tang@intel.com, ebiederm@xmission.com
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] mm: remove offset check on page->compound_head and folio->lru
Date: Thu,  6 Jan 2022 23:52:54 +0000	[thread overview]
Message-ID: <20220106235254.19190-1-richard.weiyang@gmail.com> (raw)

FOLIO_MATCH() is used to make sure struct page and folio has identical
layout for the first several words.

The comparison of offset between page->compound_head and folio->lru is
more like an internal check in struct page.

This patch just removes it.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
---
 include/linux/mm_types.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 0a2de709fe40..087d6768bc78 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -289,7 +289,6 @@ static_assert(sizeof(struct page) == sizeof(struct folio));
 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);
 FOLIO_MATCH(_mapcount, _mapcount);
-- 
2.33.1


             reply	other threads:[~2022-01-06 23:53 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-06 23:52 Wei Yang [this message]
2022-01-07  3:59 ` [PATCH] mm: remove offset check on page->compound_head and folio->lru Matthew Wilcox
2022-01-07 13:40   ` Wei Yang
2022-01-07 22:11     ` Matthew Wilcox
2022-01-08  0:08       ` Andrew Morton
2022-01-08  0:49         ` Matthew Wilcox
2022-01-08  2:41           ` Andrew Morton
2022-01-08  8:13           ` Wei Yang
2022-01-23  1:38             ` Wei Yang
2022-01-24 10:30               ` Vlastimil Babka
2022-01-24 22:55                 ` Wei Yang
2022-01-25 10:11                   ` Vlastimil Babka
2022-01-27  1:10                     ` Wei Yang
2022-01-27 15:42                       ` Vlastimil Babka
2022-01-29  0:47                         ` Wei Yang
2022-02-24  1:03                 ` Wei Yang
2022-02-17  0:34           ` Wei Yang
2022-01-08  0:27       ` Wei Yang

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