Re: [PATCH v3 2/4] mm: simplify parater of function memmap_init_zone()

David Hildenbrand
2021-01-05T16:55:11Z

[...]

> -void __meminit
> -memmap_init_zone(unsigned long size, int nid, unsigned long zone,
> - unsigned long start_pfn)
> +void __meminit memmap_init_zone(struct zone *zone)
> {
> + unsigned long size = zone->spanned_pages;
> + int nid = zone_to_nid(zone), zone_id = zone_idx(zone);
> + unsigned long start_pfn = zone->zone_start_pfn;
> +

Nit: reverse Christmas tree.

> if (!vmem_map) {
> - memmap_init_range(size, nid, zone, start_pfn, start_pfn + size,
> + memmap_init_range(size, nid, zone_id, start_pfn, start_pfn + size,
> MEMINIT_EARLY, NULL, MIGRATE_MOVABLE);
> } else {
> struct page *start;
> @@ -556,7 +558,7 @@ memmap_init_zone(unsigned long size, int nid, unsigned long zone,
> args.start = start;
> args.end = start + size;
> args.nid = nid;
> - args.zone = zone;
> + args.zone = zone_id;
>
> efi_memmap_walk(virtual_memmap_init, &args);
> }
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 69ebf75be91c..b2a46ffdaf0b 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -6292,16 +6292,16 @@ static inline u64 init_unavailable_range(unsigned long spfn, unsigned long epfn,
> }
> #endif
>
> -void __init __weak memmap_init_zone(unsigned long size, int nid,
> - unsigned long zone,
> - unsigned long zone_start_pfn)
> +void __init __weak memmap_init_zone(struct zone *zone)
> {
> unsigned long start_pfn, end_pfn, hole_start_pfn = 0;
> - unsigned long zone_end_pfn = zone_start_pfn + size;
> + int i, nid = zone_to_nid(zone), zone_id = zone_idx(zone);
> + unsigned long zone_start_pfn = zone->zone_start_pfn;
> + unsigned long zone_end_pfn = zone_start_pfn + zone->spanned_pages;

dito.

> u64 pgcnt = 0;
> - int i;
>
> for_each_mem_pfn_range(i, nid, &start_pfn, &end_pfn, NULL) {
> + unsigned long size;

You can just get rid of this parameter IMHO.

(Also, there is an empty line missing right now)

Apart from that LGTM

--
Thanks,

David / dhildenb