From nobody Sat Jul 25 02:11:08 2026 Received: from mail-pf1-f182.google.com (mail-pf1-f182.google.com [209.85.210.182]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7DD86432BD8 for ; Mon, 20 Jul 2026 15:09:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.182 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784560169; cv=none; b=ULMP5B0OMVLYj0t0lAWCqcdNuTaJ/MNrIQs8W5/BTZ3VjwcOMO/FtP0j01Q7D1GJjwBupAK2qQyJY6/yo3aFR8OYgTQa8PC8ErIsBdFbPW/7+IG8ouZBg7pLcXamhIvt367uIC1dxSm4l4d7SSAm/6MlbeazEYRz8S6qAUa8Y8w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784560169; c=relaxed/simple; bh=63hMszw/Evy32onhOKUPJ7jttM008HRKgUQVKE88T8Q=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=M3JDmJabpAzt0JOYSyIYuwXxugYNrhGSKZ6ahrNto8fQlOHtR7moSSZYzUbV0Yh6RGv1V4XPZhKlsDwHtfgw52vnoDOkM4+WruC6AZ4k639y3giQvsLK8SuYp9K1Rn6EdMV9hDRL1MKNq9BJCg3D0PJpiNQ1KzYBfb8cZRmz8sc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=RFcticMl; arc=none smtp.client-ip=209.85.210.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="RFcticMl" Received: by mail-pf1-f182.google.com with SMTP id d2e1a72fcca58-8485b358552so11002241b3a.2 for ; Mon, 20 Jul 2026 08:09:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1784560168; x=1785164968; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=gIaMa0p8G4f7glb1Lz6VEdYbpo7o2b5ERWXtcoXZflI=; b=RFcticMllwQbgi8ZNl5KQQjxdwAq3VQjVBQbVYzsoSHhYo4P6A0nemBu9SXBmAo84J 7xX0KOnQVlpLuuCFAnQiU/FsVxYf1Vx/Cm7JYt5iI0d+bb5ZywLrBdr8J022CppN0sLU UbZWKUtgIY3yH5HdGCeCXYzrA04ZURh8guz53DIxGYqJDwi5URotYLXg69QhcFyyizdQ JK/snC4DOGKgA6jX7R2enOhQl37lvuvOdzR4pdMVzbwyKuFQ9nMllzhALcbxw3czue5D FvskA/3DitnCWaz6pW5VF+/JAbzae3pBqtM+eggBcKLttPvPeMaIpLJL/PBQUcvwQJhQ jXCw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784560168; x=1785164968; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=gIaMa0p8G4f7glb1Lz6VEdYbpo7o2b5ERWXtcoXZflI=; b=NB5eXQLoPyBne2FpWGyd6hv6lTSUh3gX3dlAQhe0q3fzOTCK4IF1mgFMkaj7pxivwh nJsB8HOk32SSJfYe0hCtB09pcQD6aCl7aCQZXmC1NEFcjVCxqKoHnJpMBhRXK8X6To20 txv4br4pfUvnX5D2RRkGWBZCSy+SWY+q582X66mV+rBDa+nny8LN0QOmJm9gUAtJRnzb 8zVAijVAblaCI/Fixl7jtuEaVJdnMwYCBQeJyLrOPf3+TS31VGxn8WJ9OsbaDv5hw87N UYjg9abBBX7ErhOwGVodqz6SdKw2kdPGafWVXNr3ly2M2tNPDdtuJuSweaBnLkZw14NK frJg== X-Forwarded-Encrypted: i=1; AHgh+Rr1K458I0gnavadXT2dYSPZjeCRsE5c3cJ2KGNKuztThc6LZLxVplCCK0bHz8WMgW3SKzg1PckXo8Obsuw=@vger.kernel.org X-Gm-Message-State: AOJu0YwadSsNN5q83gEju44mg/sF85/VHo1bkIDJHsbpkvnlB8FIUNHR qtH18Me2z7gHFnP+Sp1cjss1LY62rDSTlPUH5NdviiONyQcuKCSUwNVX X-Gm-Gg: AfdE7cm5V32nD1ZCb/k2+LNIq9GHEi/H2/wFvdD7h3nAmID1nFYYFT7QJum3CFMEP+3 4onCPf7Mf7E7agaF67savd7ZQA4yTz0bQ7QpRVO0ElYJQwng7fBFtFnVh4Wdn2CRsjL7XZ4fUYh qBqi2IObDFndSvau2Za+atle48liM5lzdmkTLkmJH7J9d5+AqS+A832tXpJ0P1GQUuJ138XXoe2 FcgRzbHNqrjXV/HLPu6H6HTgaTSDWlG9T/v+CYPUjlLCtDarHW+U+3X03leBWBtePMOrBxNuSJq ob3N+HCpmb7QGdHS7gIpPYSVY+OkhYe4paebjbItTxHDoovHIbQUTB6IysXrLrDfdJlr9ZiVMPr PM77LABaKZU0AuWCD4ittbNl401pmNu2aRtPBIibYXOr9kuFHJ5PDLR8uCMV9wQosEL7Q/6NyMn Wm8yNa6Z8= X-Received: by 2002:a05:6a00:170b:b0:848:4b49:27fb with SMTP id d2e1a72fcca58-84c294edfa7mr14233298b3a.78.1784560167816; Mon, 20 Jul 2026 08:09:27 -0700 (PDT) Received: from ubuntu.. ([110.9.142.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84c2adcd3dcsm5938032b3a.24.2026.07.20.08.09.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Jul 2026 08:09:27 -0700 (PDT) From: Sang-Heon Jeon To: Mike Rapoport , Andrew Morton Cc: Sang-Heon Jeon , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH] mm/mm_init: remove redundant memset in free_area_init() Date: Tue, 21 Jul 2026 00:09:13 +0900 Message-ID: <20260720150915.756749-1-ekffu200098@gmail.com> X-Mailer: git-send-email 2.43.0 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" zone_movable_pfn is zero-initialized and only set by find_zone_movable_pfns_for_nodes(), which runs once during boot right after the memset, so the memset has no effect. Remove redundant memset. No functional change. Signed-off-by: Sang-Heon Jeon --- mm/mm_init.c | 1 - 1 file changed, 1 deletion(-) diff --git a/mm/mm_init.c b/mm/mm_init.c index 711f821f7b3c..144bb4042942 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -1844,7 +1844,6 @@ static void __init free_area_init(void) } =20 /* Find the PFNs that ZONE_MOVABLE begins at in each node */ - memset(zone_movable_pfn, 0, sizeof(zone_movable_pfn)); find_zone_movable_pfns_for_nodes(); =20 /* Print out the zone ranges */ --=20 2.43.0