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authorWei Yang <richard.weiyang@gmail.com>2018-06-07 17:06:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-07 17:34:35 -0700
commite69438596bb3e97809e76be315e54a4a444f4797 (patch)
tree307e813f11204cf50d1ac109c6dccc33f8e39ebf /mm
parent5d752600a8c373382264392f5b573b2fc9c0e8ea (diff)
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 <richard.weiyang@gmail.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Michal Hocko <mhocko@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/page_alloc.c8
1 files 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