From: chengkaitao <pilgrimtao@gmail.com>
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 <chengkaitao@kylinos.cn>
Subject: [PATCH] x86/mm: remove redundant computation of pmd_leaf
Date: Mon, 5 Jan 2026 19:51:51 +0800 [thread overview]
Message-ID: <20260105115152.86950-1-pilgrimtao@gmail.com> (raw)
From: Chengkaitao <chengkaitao@kylinos.cn>
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 <chengkaitao@kylinos.cn>
---
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 = pmd_leaf(*pmd);
- if (pmd_leaf(*pmd)) {
+ if (large) {
vmemmap_verify((pte_t *)pmd, node, addr, next);
vmemmap_use_sub_pmd(addr, next);
}
--
2.50.1 (Apple Git-155)
reply other threads:[~2026-01-05 11:52 UTC|newest]
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