[PATCH v5 3/5] mm: simplify parater of function memmap_init_zone()

[Baoquan He]

As David suggested, simply passing 'struct zone *zone' is enough. We can
get all needed information from 'struct zone*' easily.

Suggested-by: David Hildenbrand <da...@redhat.com>
Signed-off-by: Baoquan He <b...@redhat.com>
---
 arch/ia64/mm/init.c | 12 +++++++-----
 include/linux/mm.h  |  3 +--
 mm/page_alloc.c     | 24 +++++++++++-------------
 3 files changed, 19 insertions(+), 20 deletions(-)

diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index c8e68e92beb3..88fb44895408 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)
 {
+       int nid = zone_to_nid(zone), zone_id = zone_idx(zone);
+       unsigned long start_pfn = zone->zone_start_pfn;
+       unsigned long size = zone->spanned_pages;
+
        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/include/linux/mm.h b/include/linux/mm.h
index 2395dc212221..073049bd0b29 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2401,8 +2401,7 @@ extern void set_dma_reserve(unsigned long 
new_dma_reserve);
 extern void memmap_init_range(unsigned long, int, unsigned long,
                unsigned long, unsigned long, enum meminit_context,
                struct vmem_altmap *, int migratetype);
-extern void memmap_init_zone(unsigned long size, int nid,
-               unsigned long zone, unsigned long range_start_pfn);
+extern void memmap_init_zone(struct zone *zone);
 extern void setup_per_zone_wmarks(void);
 extern int __meminit init_per_zone_wmark_min(void);
 extern void mem_init(void);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 42a1d2d2a87d..cbb67d9c1b2a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6254,23 +6254,21 @@ static void __meminit zone_init_free_lists(struct zone 
*zone)
        }
 }
 
-void __meminit __weak memmap_init_zone(unsigned long size, int nid,
-                                 unsigned long zone,
-                                 unsigned long range_start_pfn)
+void __meminit __weak memmap_init_zone(struct zone *zone)
 {
+       unsigned long zone_start_pfn = zone->zone_start_pfn;
+       unsigned long zone_end_pfn = zone_start_pfn + zone->spanned_pages;
+       int i, nid = zone_to_nid(zone), zone_id = zone_idx(zone);
        unsigned long start_pfn, end_pfn;
-       unsigned long range_end_pfn = range_start_pfn + size;
-       int i;
 
        for_each_mem_pfn_range(i, nid, &start_pfn, &end_pfn, NULL) {
-               start_pfn = clamp(start_pfn, range_start_pfn, range_end_pfn);
-               end_pfn = clamp(end_pfn, range_start_pfn, range_end_pfn);
+               start_pfn = clamp(start_pfn, zone_start_pfn, zone_end_pfn);
+               end_pfn = clamp(end_pfn, zone_start_pfn, zone_end_pfn);
 
-               if (end_pfn > start_pfn) {
-                       size = end_pfn - start_pfn;
-                       memmap_init_range(size, nid, zone, start_pfn, 
range_end_pfn,
-                                        MEMINIT_EARLY, NULL, MIGRATE_MOVABLE);
-               }
+               if (end_pfn > start_pfn)
+                       memmap_init_range(end_pfn - start_pfn, nid,
+                                       zone_id, start_pfn, zone_end_pfn,
+                                       MEMINIT_EARLY, NULL, MIGRATE_MOVABLE);
        }
 }
 
@@ -6978,7 +6976,7 @@ 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);
        }
 }
 
-- 
2.17.2