[PATCH v4 3/4] mm: simplify parameter of setup_usemap()

[Baoquan He]

Parameter 'zone' has got needed information, let's remove other
unnecessary parameters.

Signed-off-by: Baoquan He <b...@redhat.com>
Reviewed-by: Mike Rapoport <r...@linux.ibm.com>
Reviewed-by: David Hildenbrand <da...@redhat.com>
---
 mm/page_alloc.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index cbb67d9c1b2a..69cf19baac12 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6761,25 +6761,22 @@ static unsigned long __init usemap_size(unsigned long 
zone_start_pfn, unsigned l
        return usemapsize / 8;
 }
 
-static void __ref setup_usemap(struct pglist_data *pgdat,
-                               struct zone *zone,
-                               unsigned long zone_start_pfn,
-                               unsigned long zonesize)
+static void __ref setup_usemap(struct zone *zone)
 {
-       unsigned long usemapsize = usemap_size(zone_start_pfn, zonesize);
+       unsigned long usemapsize = usemap_size(zone->zone_start_pfn,
+                                              zone->spanned_pages);
        zone->pageblock_flags = NULL;
        if (usemapsize) {
                zone->pageblock_flags =
                        memblock_alloc_node(usemapsize, SMP_CACHE_BYTES,
-                                           pgdat->node_id);
+                                           zone_to_nid(zone));
                if (!zone->pageblock_flags)
                        panic("Failed to allocate %ld bytes for zone %s 
pageblock flags on node %d\n",
-                             usemapsize, zone->name, pgdat->node_id);
+                             usemapsize, zone->name, zone_to_nid(zone));
        }
 }
 #else
-static inline void setup_usemap(struct pglist_data *pgdat, struct zone *zone,
-                               unsigned long zone_start_pfn, unsigned long 
zonesize) {}
+static inline void setup_usemap(struct zone *zone) {}
 #endif /* CONFIG_SPARSEMEM */
 
 #ifdef CONFIG_HUGETLB_PAGE_SIZE_VARIABLE
@@ -6974,7 +6971,7 @@ static void __init free_area_init_core(struct pglist_data 
*pgdat)
                        continue;
 
                set_pageblock_order();
-               setup_usemap(pgdat, zone, zone_start_pfn, size);
+               setup_usemap(zone);
                init_currently_empty_zone(zone, zone_start_pfn, size);
                memmap_init_zone(zone);
        }
-- 
2.17.2