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Mon, 05 Jan 2026 03:52:03 -0800 (PST) Received: from localhost.localdomain ([116.128.244.171]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c1e7c62637bsm42375779a12.30.2026.01.05.03.51.58 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Mon, 05 Jan 2026 03:52:02 -0800 (PST) From: chengkaitao To: dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com Cc: linux-kernel@vger.kernel.org, Chengkaitao Subject: [PATCH] x86/mm: remove redundant computation of pmd_leaf Date: Mon, 5 Jan 2026 19:51:51 +0800 Message-ID: <20260105115152.86950-1-pilgrimtao@gmail.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Chengkaitao In the function vmemmap_check_pmd, the result of pmd_leaf(*pmd) has already been stored in the variable large. The subsequent code can directly use this precomputed value instead of recalculating it. Signed-off-by: Chengkaitao --- arch/x86/mm/init_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 9983017ecbe0..e361a81f7ccb 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -1551,7 +1551,7 @@ int __meminit vmemmap_check_pmd(pmd_t *pmd, int node, { int large =3D pmd_leaf(*pmd); =20 - if (pmd_leaf(*pmd)) { + if (large) { vmemmap_verify((pte_t *)pmd, node, addr, next); vmemmap_use_sub_pmd(addr, next); } --=20 2.50.1 (Apple Git-155)