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lib/show_mem.c: use for_each_populated_zone() simplify code

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__show_mem() needs to iterate over all zones that have memory, we can
simplify the code by using for_each_populated_zone().

Link: https://lkml.kernel.org/r/20230417035226.4013584-1-yajun.deng@linux.dev
Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Yajun Deng 2023-04-17 11:52:26 +08:00 committed by Andrew Morton
parent 4bf4f155bf
commit 13215e8a4b
1 changed files with 6 additions and 13 deletions
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19
lib/show_mem.c
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@ -10,26 +10,19 @@
void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx) void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx)
{ {
pg_data_t *pgdat;
unsigned long total = 0, reserved = 0, highmem = 0; unsigned long total = 0, reserved = 0, highmem = 0;
struct zone *zone;
printk("Mem-Info:\n"); printk("Mem-Info:\n");
__show_free_areas(filter, nodemask, max_zone_idx); __show_free_areas(filter, nodemask, max_zone_idx);
for_each_online_pgdat(pgdat) { for_each_populated_zone(zone) {
int zoneid;
for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) { total += zone->present_pages;
struct zone *zone = &pgdat->node_zones[zoneid]; reserved += zone->present_pages - zone_managed_pages(zone);
if (!populated_zone(zone))
continue;
total += zone->present_pages; if (is_highmem(zone))
reserved += zone->present_pages - zone_managed_pages(zone); highmem += zone->present_pages;
if (is_highmem_idx(zoneid))
highmem += zone->present_pages;
}
} }
printk("%lu pages RAM\n", total); printk("%lu pages RAM\n", total);