[patch 106/173] mm: remove unneeded local variable in free_area_init_core

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From: Baoquan He <bhe@xxxxxxxxxx>
Subject: mm: remove unneeded local variable in free_area_init_core

Local variable 'zone_start_pfn' is not needed since there's only one call
site in free_area_init_core().  Let's remove it and pass
zone->zone_start_pfn directly to init_currently_empty_zone().

Link: https://lkml.kernel.org/r/20210122135956.5946-6-bhe@xxxxxxxxxx
Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
Reviewed-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/page_alloc.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/mm/page_alloc.c~mm-remove-unneeded-local-variable-in-free_area_init_core
+++ a/mm/page_alloc.c
@@ -6927,7 +6927,6 @@ static void __init free_area_init_core(s
 	for (j = 0; j < MAX_NR_ZONES; j++) {
 		struct zone *zone = pgdat->node_zones + j;
 		unsigned long size, freesize, memmap_pages;
-		unsigned long zone_start_pfn = zone->zone_start_pfn;
 
 		size = zone->spanned_pages;
 		freesize = zone->present_pages;
@@ -6976,7 +6975,7 @@ static void __init free_area_init_core(s
 
 		set_pageblock_order();
 		setup_usemap(zone);
-		init_currently_empty_zone(zone, zone_start_pfn, size);
+		init_currently_empty_zone(zone, zone->zone_start_pfn, size);
 		memmap_init_zone(zone);
 	}
 }
_




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