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Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1utssU-00000006qAH-4Awc; Wed, 03 Sep 2025 19:10:43 +0000 From: "Matthew Wilcox (Oracle)" To: Andrew Morton Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, Hugh Dickins Subject: [PATCH] mm: Remove mlock_count from struct page Date: Wed, 3 Sep 2025 20:10:39 +0100 Message-ID: <20250903191041.1630338-1-willy@infradead.org> X-Mailer: git-send-email 2.50.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: C29CE180017 X-Rspam-User: X-Stat-Signature: wuxtehfr3z3ffcahmuxswusu1xzzy3fg X-Rspamd-Server: rspam09 X-HE-Tag: 1756926646-565560 X-HE-Meta: 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 kKJLck2J MHY+eGbkZPLu2A05uZp9GnE6lp8DLfKVTib0yZDF3cCrIh2yj2jd/GipJdmo+R0uVeCTkOmy4o9ic4yo+8hc1hBGPz/TIkAS5kKSkG2wlgpG3DLoQOZuM/6O7EXQcwVHL0hOkiuVNWQin+XKs9QB8OH8Nfb2G11Ndk891zZkaNIEwGixpVVB3xMRVQxh/1ROfX1mf2imIYFR8c5MG8JrLV2ONxqDm7euLViMKTo4Vage1Vez8krlugs0MnAd1iZAh4+6B7+vkfhAWJLI= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: All users now use folio->mlock_count so we can remove this element of struct page. Move the useful comments over to struct folio. Signed-off-by: Matthew Wilcox (Oracle) --- include/linux/mm_types.h | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index d934a3a5b443..34205313a839 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -94,14 +94,6 @@ struct page { union { struct list_head lru; - /* Or, for the Unevictable "LRU list" slot */ - struct { - /* Always even, to negate PageTail */ - void *__filler; - /* Count page's or folio's mlocks */ - unsigned int mlock_count; - }; - /* Or, free page */ struct list_head buddy_list; struct list_head pcp_list; @@ -391,7 +383,9 @@ struct folio { union { struct list_head lru; /* private: avoid cluttering the output */ + /* For the Unevictable "LRU list" slot */ struct { + /* Avoid compound_head */ void *__filler; /* public: */ unsigned int mlock_count; -- 2.47.2