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mm/mm_init.c: get the highest zone directly

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We have recorded nr_zones in pgdat, just get it directly.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org>
Link: https://lore.kernel.org/all/20240605071339.15330-1-richard.weiyang@gmail.com
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
This commit is contained in:
Wei Yang 2024-06-05 07:13:37 +00:00 committed by Mike Rapoport (IBM)
parent 922306a253
commit ce8ebb9543
1 changed files with 4 additions and 8 deletions
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12
mm/mm_init.c
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@ -2140,7 +2140,7 @@ static int __init deferred_init_memmap(void *data)
unsigned long first_init_pfn, flags;
unsigned long start = jiffies;
struct zone *zone;
int zid, max_threads;
int max_threads;
u64 i;
/* Bind memory initialisation thread to a local node if possible */
@ -2167,12 +2167,8 @@ static int __init deferred_init_memmap(void *data)
*/
pgdat_resize_unlock(pgdat, &flags);
/* Only the highest zone is deferred so find it */
for (zid = 0; zid < MAX_NR_ZONES; zid++) {
zone = pgdat->node_zones + zid;
if (first_init_pfn < zone_end_pfn(zone))
break;
}
/* Only the highest zone is deferred */
zone = pgdat->node_zones + pgdat->nr_zones - 1;
/* If the zone is empty somebody else may have cleared out the zone */
if (!deferred_init_mem_pfn_range_in_zone(&i, zone, &spfn, &epfn,
@ -2200,7 +2196,7 @@ static int __init deferred_init_memmap(void *data)
}
zone_empty:
/* Sanity check that the next zone really is unpopulated */
WARN_ON(++zid < MAX_NR_ZONES && populated_zone(++zone));
WARN_ON(pgdat->nr_zones < MAX_NR_ZONES && populated_zone(++zone));
pr_info("node %d deferred pages initialised in %ums\n",
pgdat->node_id, jiffies_to_msecs(jiffies - start));