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Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1us1K7-0000000EFwF-0cq8; Fri, 29 Aug 2025 15:47:31 +0000 From: "Matthew Wilcox (Oracle)" To: Vlastimil Babka , Andrew Morton Cc: "Matthew Wilcox (Oracle)" , Christoph Lameter , David Rientjes , Roman Gushchin , Harry Yoo , linux-mm@kvack.org Subject: [PATCH 05/22] mm: Constify compound_order() and page_size() Date: Fri, 29 Aug 2025 16:47:09 +0100 Message-ID: <20250829154728.3397606-6-willy@infradead.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250829154728.3397606-1-willy@infradead.org> References: <20250829154728.3397606-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: noxyhxxo7prqq1xc6mm6jzai8t94q1r3 X-Rspam-User: X-Rspamd-Queue-Id: 6E305C000E X-Rspamd-Server: rspam05 X-HE-Tag: 1756482458-34846 X-HE-Meta: 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 91X5ibgI tVSQlbpzVZLho5xYCXCSCx3HhdcByhP2SHOzWzr8N0agf07rZEMThg7NcLgLO64RqQ9lOuDnY7VFrb8ct4M48RdjJ4HNZfGqx2wtAwCRLBaDiCdwMajwe/g4seNYI4HzT9KzfN61YD0Z2fE2foYAg+YwM4gwE1kuiHDGxf1GBGtNvpPKrWkhzqFH9bYIHSawVp8hPs1khzX+OF6difvmjageLoJJUxUv5XAjBczx8NqTbEOgBeme3fvkY5AuvyyfaVhEu/o+t+Ni61IE= 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: These functions do not modify their arguments. Telling the compiler this may improve code generation, and allows us to pass const arguments from other functions. Signed-off-by: Matthew Wilcox (Oracle) --- include/linux/mm.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 00c8a54127d3..02fddbc38647 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1020,9 +1020,9 @@ static inline long folio_large_nr_pages(const struct folio *folio) * set before the order is initialised, or this may be a tail page. * See compaction.c for some good examples. */ -static inline unsigned int compound_order(struct page *page) +static inline unsigned int compound_order(const struct page *page) { - struct folio *folio = (struct folio *)page; + const struct folio *folio = (struct folio *)page; if (!test_bit(PG_head, &folio->flags.f)) return 0; @@ -1240,7 +1240,7 @@ int folio_mc_copy(struct folio *dst, struct folio *src); unsigned long nr_free_buffer_pages(void); /* Returns the number of bytes in this potentially compound page. */ -static inline unsigned long page_size(struct page *page) +static inline unsigned long page_size(const struct page *page) { return PAGE_SIZE << compound_order(page); } -- 2.47.2