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([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 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: 0ABB44000B X-Rspamd-Server: rspam01 X-Stat-Signature: fmfmfekqfbpxtqky7tokabzzzrxp74i3 X-HE-Tag: 1784560168-926171 X-HE-Meta: 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 TbxaEgjD IyGqfvIIaKWbxgFD1j07OPflVhsKnSnK5It0isimrU2sspsqAIanyY6NYM1uYw4W5rE12E5YuV7Ojaza9/feq40idvMHz+udhTqRLX828ZYpuDw0sqJDsr/KM18CQUBtfL0rEQY9mexhgT1oPXd0vE+kQdIbZvVosFnnOafNSxUmu3P6WZIEXgggnnXyDgxkGM0/3WyvFbHPLh//Ug419+XOUcFe8F8ga9r5v4MYVwJVLZLkbcCoNb7s0u1BFrq4b0nWWXR6KpcZN+jRGMduk9KmAlMy/0qbdvijfbozEEvIAgRBEnfjvAUhKnr5lzO9Ut4jJscbiL4YwD2lS4B3L5f5sb6pputhQ7VmkvcZSr5nYCIYOh+B2ozgXLvZ5TCiFc+oHXs29Hrp6kv9zaSnLhwzrRIVs5Ey2bT6DpB8yrCFEnm7IyISBlyQApOamCr7s7vHIRAwAI7ubDro= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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) } /* 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(); /* Print out the zone ranges */ -- 2.43.0