diff mbox series

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

Message ID 20210105074708.18483-3-bhe@redhat.com (mailing list archive)
State New, archived
Headers show
Series mm: clean up names and parameters of memmap_init_xxxx functions | expand

Commit Message

Baoquan He Jan. 5, 2021, 7:47 a.m. UTC 
As David suggested, simply passing 'struct zone *zone' is enough. We can
get all needed information from 'struct zone*' easily.

Suggested-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
---
 arch/ia64/include/asm/pgtable.h |  3 +--
 arch/ia64/mm/init.c             | 12 +++++++-----
 mm/page_alloc.c                 | 20 ++++++++++----------
 3 files changed, 18 insertions(+), 17 deletions(-)

Comments

David Hildenbrand Jan. 5, 2021, 4:53 p.m. UTC | #1 
[...]

> -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
Baoquan He Jan. 7, 2021, 1:18 p.m. UTC | #2 
On 01/05/21 at 05:53pm, David Hildenbrand wrote:
> [...]
> 
> > -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.

Ah, yes, I will reorder these lines.

> 
> >  	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.

OK.

> 
> >  	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.

Someone possibly like a intermediate local variable better in this case,
but I am fine to both, will change as you suggested.

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

Sure. Thanks.

> 
> 
> Apart from that LGTM
> 
> -- 
> Thanks,
> 
> David / dhildenb
diff mbox series

Patch

diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h
index dce2ff37df65..2c81394a2430 100644
--- a/arch/ia64/include/asm/pgtable.h
+++ b/arch/ia64/include/asm/pgtable.h
@@ -520,8 +520,7 @@  extern struct page *zero_page_memmap_ptr;
 
 #  ifdef CONFIG_VIRTUAL_MEM_MAP
   /* arch mem_map init routine is needed due to holes in a virtual mem_map */
-    extern void memmap_init_zone(unsigned long size, int nid, unsigned long zone,
-			     unsigned long start_pfn);
+    extern void memmap_init_zone(struct zone *zone);
 #  endif /* CONFIG_VIRTUAL_MEM_MAP */
 # endif /* !__ASSEMBLY__ */
 
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index c8e68e92beb3..ccbda1a74c95 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -541,12 +541,14 @@  virtual_memmap_init(u64 start, u64 end, void *arg)
 	return 0;
 }
 
-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;
+
 	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;
 	u64 pgcnt = 0;
-	int i;
 
 	for_each_mem_pfn_range(i, nid, &start_pfn, &end_pfn, NULL) {
+		unsigned long size;
 		start_pfn = clamp(start_pfn, zone_start_pfn, zone_end_pfn);
 		end_pfn = clamp(end_pfn, zone_start_pfn, zone_end_pfn);
 		hole_start_pfn = clamp(hole_start_pfn, zone_start_pfn,
@@ -6309,13 +6309,13 @@  void __init __weak memmap_init_zone(unsigned long size, int nid,
 
 		if (end_pfn > start_pfn) {
 			size = end_pfn - start_pfn;
-			memmap_init_range(size, nid, zone, start_pfn, zone_end_pfn,
+			memmap_init_range(size, nid, zone_id, start_pfn, zone_end_pfn,
 					 MEMINIT_EARLY, NULL, MIGRATE_MOVABLE);
 		}
 
 		if (hole_start_pfn < start_pfn)
 			pgcnt += init_unavailable_range(hole_start_pfn,
-							start_pfn, zone, nid);
+							start_pfn, zone_id, nid);
 		hole_start_pfn = end_pfn;
 	}
 
@@ -6328,11 +6328,11 @@  void __init __weak memmap_init_zone(unsigned long size, int nid,
 	 */
 	if (hole_start_pfn < zone_end_pfn)
 		pgcnt += init_unavailable_range(hole_start_pfn, zone_end_pfn,
-						zone, nid);
+						zone_id, nid);
 
 	if (pgcnt)
 		pr_info("%s: Zeroed struct page in unavailable ranges: %lld\n",
-			zone_names[zone], pgcnt);
+			zone_names[zone_id], pgcnt);
 }
 
 static int zone_batchsize(struct zone *zone)
@@ -7039,7 +7039,7 @@  static void __init free_area_init_core(struct pglist_data *pgdat)
 		set_pageblock_order();
 		setup_usemap(pgdat, zone, zone_start_pfn, size);
 		init_currently_empty_zone(zone, zone_start_pfn, size);
-		memmap_init_zone(size, nid, j, zone_start_pfn);
+		memmap_init_zone(zone);
 	}
 }