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Wed, 12 Feb 2025 10:59:01 +0800 From: Liu Ye To: brauner@kernel.org, dhowells@redhat.com, akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Liu Ye Subject: [PATCH 2/2] mm/mm.h: Write folio->_flags_1 & 0xff as a macro definition Date: Wed, 12 Feb 2025 10:58:43 +0800 Message-Id: <20250212025843.80283-3-liuye@kylinos.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250212025843.80283-1-liuye@kylinos.cn> References: <20250212025843.80283-1-liuye@kylinos.cn> MIME-Version: 1.0 X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 28D31180005 X-Stat-Signature: kp3z4daau3b6ozyw3x7ri9gsopkkeazw X-HE-Tag: 1739329146-926323 X-HE-Meta: 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 ZaUoYqFQ Xt+OvjkHC3EXxP9VfH1xe9NnGb1cZwAX/2/q9a+rXzbehy1yVF3zqo9+pv6ZFK6mOPl/T8oVA7zuCm58= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000077, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: There are multiple locations in mm.h where (folio->_flags_1 & 0xff) is used. Write it as a macro definition to improve the readability and maintainability of the code. Signed-off-by: Liu Ye --- include/linux/mm.h | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 7b1068ddcbb7..750e75f45557 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1098,6 +1098,8 @@ int vma_is_stack_for_current(struct vm_area_struct *vma); struct mmu_gather; struct inode; +#define FOLIO_ORDER(folio) ((folio)->_flags_1 & 0xff) + /* * compound_order() can be called without holding a reference, which means * that niceties like page_folio() don't work. These callers should be @@ -1111,7 +1113,7 @@ static inline unsigned int compound_order(struct page *page) if (!test_bit(PG_head, &folio->flags)) return 0; - return folio->_flags_1 & 0xff; + return FOLIO_ORDER(folio); } /** @@ -1127,7 +1129,7 @@ static inline unsigned int folio_order(const struct folio *folio) { if (!folio_test_large(folio)) return 0; - return folio->_flags_1 & 0xff; + return FOLIO_ORDER(folio); } #include @@ -2061,7 +2063,7 @@ static inline long folio_nr_pages(const struct folio *folio) #ifdef CONFIG_64BIT return folio->_folio_nr_pages; #else - return 1L << (folio->_flags_1 & 0xff); + return 1L << FOLIO_ORDER(folio); #endif } @@ -2086,7 +2088,7 @@ static inline unsigned long compound_nr(struct page *page) #ifdef CONFIG_64BIT return folio->_folio_nr_pages; #else - return 1L << (folio->_flags_1 & 0xff); + return 1L << FOLIO_ORDER(folio); #endif }