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([110.9.142.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84f459b66e6sm1662739b3a.40.2026.08.06.09.21.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Aug 2026 09:21:30 -0700 (PDT) From: Sang-Heon Jeon To: Mike Rapoport , Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v2 5/5] mm/mm_init: clean up zone_spanned_pages_in_node() Date: Fri, 7 Aug 2026 01:20:56 +0900 Message-ID: <20260806162100.313965-6-ekffu200098@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260806162100.313965-1-ekffu200098@gmail.com> References: <20260806162100.313965-1-ekffu200098@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 8B5A11C0007 X-Stat-Signature: k67eahuss3fma8zw47muofugchy9ozee X-HE-Tag: 1786033292-123062 X-HE-Meta: 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 YMhr21b3 PA+tKqHTvQGFwo5Mv730Xg25tkpL9efSFqHPZPln+ru5+8OT96ORzZ/hmgXsF8I59T4WOsZJl3mrDgditEYAMHqt+yCRbc9O33hdLimjjWw0X+MqumqobP2/913/8DH2IJQ/fWjzPC8IjBxz5XRSns0Fl49sP2Sf9RRliHILbVW+joN7rNZcEu+2bmwxKNpa2dTB74XN+Unh2v28mz3584CgxpgVrPxNA3v2+w48rurYWFVHqUgKhhMKM8/VwWkPfbVv1h+E9BQ9X2patwD1FVv9QHlqrNHqVOgTRcWIyyCCNItEk9JRs8Uajtj8ZifTGH252Z4W/kJ5NS45i5mzQRxYVBAE2I8yqplfP6n2nZP+j3O7vIz8e0t33JFNCU660UsWq/MHVmp3CO0Jf+7pxJDmjJeSPxPTWKf7O2jLTYJ6+4/1ifQ0x0SB9HnzZN4p0O8o+4Z+qaWePmIg= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Extract zone_movable_pfn[nid], which is used four times, into a local variable, and return early to reduce the indentation level. No functional change. Signed-off-by: Sang-Heon Jeon --- mm/mm_init.c | 43 +++++++++++++++++++++++-------------------- 1 file changed, 23 insertions(+), 20 deletions(-) diff --git a/mm/mm_init.c b/mm/mm_init.c index 27f454edbebb..ab445111a846 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -1192,37 +1192,40 @@ static unsigned long __init zone_spanned_pages_in_node(int nid, { unsigned long zone_low = arch_zone_lowest_possible_pfn[zone_type]; unsigned long zone_high = arch_zone_highest_possible_pfn[zone_type]; + unsigned long movable_pfn = zone_movable_pfn[nid]; /* Get the start and end of the zone */ *zone_start_pfn = clamp(node_start_pfn, zone_low, zone_high); *zone_end_pfn = clamp(node_end_pfn, zone_low, zone_high); - /* Only adjust if ZONE_MOVABLE is on this node */ - if (zone_movable_pfn[nid]) { - /* Size ZONE_MOVABLE */ - if (zone_type == ZONE_MOVABLE) { - *zone_start_pfn = zone_movable_pfn[nid]; - *zone_end_pfn = min(node_end_pfn, - arch_zone_highest_possible_pfn[movable_zone]); + /* Nothing to adjust if ZONE_MOVABLE is not on this node */ + if (!movable_pfn) + goto out; - /* Check that this node has pages within the zone's required range */ - if (*zone_end_pfn < node_start_pfn || - *zone_start_pfn > node_end_pfn) - return 0; + /* Size ZONE_MOVABLE */ + if (zone_type == ZONE_MOVABLE) { + *zone_start_pfn = movable_pfn; + *zone_end_pfn = min(node_end_pfn, + arch_zone_highest_possible_pfn[movable_zone]); - /* Move the zone start inside the node if necessary */ - *zone_start_pfn = max(*zone_start_pfn, node_start_pfn); + /* Check that this node has pages within the zone's required range */ + if (*zone_end_pfn < node_start_pfn || + *zone_start_pfn > node_end_pfn) + return 0; - /* This range starts below ZONE_MOVABLE */ - } else if (*zone_start_pfn < zone_movable_pfn[nid]) { - *zone_end_pfn = min(*zone_end_pfn, zone_movable_pfn[nid]); + /* Move the zone start inside the node if necessary */ + *zone_start_pfn = max(*zone_start_pfn, node_start_pfn); - /* This whole range is within ZONE_MOVABLE */ - } else { - *zone_start_pfn = *zone_end_pfn; - } + /* This range starts below ZONE_MOVABLE */ + } else if (*zone_start_pfn < movable_pfn) { + *zone_end_pfn = min(*zone_end_pfn, movable_pfn); + + /* This whole range is within ZONE_MOVABLE */ + } else { + *zone_start_pfn = *zone_end_pfn; } +out: /* Return the spanned pages */ return *zone_end_pfn - *zone_start_pfn; } -- 2.43.0