mm: remove redundant initialization
pg_data_t is zeroed before reaching free_area_init_core(), so remove the
now unnecessary initializations.
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 65efb92d..ad2cfd5 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -179,11 +179,6 @@
#define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
#define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
-static inline void zap_zone_vm_stats(struct zone *zone)
-{
- memset(zone->vm_stat, 0, sizeof(zone->vm_stat));
-}
-
extern void inc_zone_state(struct zone *, enum zone_stat_item);
#ifdef CONFIG_SMP
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index a6f7576..889532b 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4377,6 +4377,8 @@
* - mark all pages reserved
* - mark all memory queues empty
* - clear the memory bitmaps
+ *
+ * NOTE: pgdat should get zeroed by caller.
*/
static void __paginginit free_area_init_core(struct pglist_data *pgdat,
unsigned long *zones_size, unsigned long *zholes_size)
@@ -4387,10 +4389,8 @@
int ret;
pgdat_resize_init(pgdat);
- pgdat->nr_zones = 0;
init_waitqueue_head(&pgdat->kswapd_wait);
init_waitqueue_head(&pgdat->pfmemalloc_wait);
- pgdat->kswapd_max_order = 0;
pgdat_page_cgroup_init(pgdat);
for (j = 0; j < MAX_NR_ZONES; j++) {
@@ -4451,11 +4451,6 @@
zone_pcp_init(zone);
lruvec_init(&zone->lruvec, zone);
- zap_zone_vm_stats(zone);
- zone->flags = 0;
-#ifdef CONFIG_MEMORY_ISOLATION
- zone->nr_pageblock_isolate = 0;
-#endif
if (!size)
continue;