From e69438596bb3e97809e76be315e54a4a444f4797 Mon Sep 17 00:00:00 2001 From: Wei Yang Date: Thu, 7 Jun 2018 17:06:04 -0700 Subject: [PATCH] mm/page_alloc: remove realsize in free_area_init_core() Highmem's realsize always equals to freesize, so it is not necessary to spare a variable to record this. Link: http://lkml.kernel.org/r/20180413083859.65888-1-richard.weiyang@gmail.com Signed-off-by: Wei Yang Reviewed-by: Andrew Morton Cc: Michal Hocko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/page_alloc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 22320ea27489..4fbe211340e0 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -6229,18 +6229,18 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat) for (j = 0; j < MAX_NR_ZONES; j++) { struct zone *zone = pgdat->node_zones + j; - unsigned long size, realsize, freesize, memmap_pages; + unsigned long size, freesize, memmap_pages; unsigned long zone_start_pfn = zone->zone_start_pfn; size = zone->spanned_pages; - realsize = freesize = zone->present_pages; + freesize = zone->present_pages; /* * Adjust freesize so that it accounts for how much memory * is used by this zone for memmap. This affects the watermark * and per-cpu initialisations */ - memmap_pages = calc_memmap_size(size, realsize); + memmap_pages = calc_memmap_size(size, freesize); if (!is_highmem_idx(j)) { if (freesize >= memmap_pages) { freesize -= memmap_pages; @@ -6272,7 +6272,7 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat) * when the bootmem allocator frees pages into the buddy system. * And all highmem pages will be managed by the buddy system. */ - zone->managed_pages = is_highmem_idx(j) ? realsize : freesize; + zone->managed_pages = freesize; #ifdef CONFIG_NUMA zone->node = nid; #endif -- GitLab