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([110.9.142.4]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-37d4f225870sm4544896a91.8.2026.06.21.07.59.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Jun 2026 08:00:00 -0700 (PDT) From: Sang-Heon Jeon To: Mike Rapoport , Andrew Morton Cc: Sang-Heon Jeon , linux-mm@kvack.org Subject: [PATCH 5/6] mm: remove unnecessary empty range check in early_calculate_totalpages() Date: Sun, 21 Jun 2026 23:59:15 +0900 Message-ID: <20260621145919.1453-6-ekffu200098@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260621145919.1453-1-ekffu200098@gmail.com> References: <20260621145919.1453-1-ekffu200098@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: BFAE94000C X-Stat-Signature: yejhsqdfyqwn3moqb67yc6pyquegr3jw X-Rspam-User: X-HE-Tag: 1782054001-367193 X-HE-Meta: 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 B+GVxBqb yxYhFEt/XNIsncdJaO3h75LSY87YOfnKeP0EUA4c7yxxqP3APhsoXJceYbq7NwKyPIA/IMyCor62Zb1p4oM/JlktDM99pDRa3Q8+6ir+2Dc3/Z0NNfcxAAZOL+j4G8o1Dm/3rN9UaOR0LZeEFE2+saUIwQONSpfoVAUwSnRkrDTNDtkqr6iWuP9s9ZCVSvdYufXLAeUk+fZyVHzengV66rFEJR12TgKuFdLzEHi2B4UX8GXdN9IjSypDWi4k0oYvkbXPF5zM1WrszBua4YHYeNU//dhMDKZ79ZvQCuvVnsFOLfJBJJZLoif5tPMu/M1kHilkTzKnqBMHMBxY7PSxKP+kkeKrXQfFlXpfkGtim+H0x+Z+alwtuqaeAjNfLH+fDDIUxPm5Eq1GeBUGR/QviYk4DJDpuLvsqC6WNFx47bUbV1ZSgV9ulnN15Buc6gpct72OSt1KD7aMY9Pw= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: early_calculate_totalpages() iterates the memory ranges with for_each_mem_pfn_range() and calls node_set_state(nid, N_MEMORY) only when end_pfn - start_pfn is non-zero. for_each_mem_pfn_range() never returns an empty range, so start_pfn < end_pfn always. Therefore the check is unnecessary, so remove it. No functional change. Signed-off-by: Sang-Heon Jeon --- mm/mm_init.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/mm/mm_init.c b/mm/mm_init.c index 0f64909e8d20..17498a13eb99 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -332,8 +332,7 @@ static unsigned long __init early_calculate_totalpages(void) unsigned long pages = end_pfn - start_pfn; totalpages += pages; - if (pages) - node_set_state(nid, N_MEMORY); + node_set_state(nid, N_MEMORY); } return totalpages; } -- 2.43.0