linux-kernel - [PATCH v2 4/5] mm: simplify parameter of setup

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Date:   Sun, 20 Dec 2020 16:27:53 +0800
From:   Baoquan He <bhe@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, akpm@...ux-foundation.org,
        gopakumarr@...are.com, rppt@...nel.org, david@...hat.com,
        bhe@...hat.com
Subject: [PATCH v2 4/5] mm: simplify parameter of setup_usemap()

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

Signed-off-by: Baoquan He <bhe@...hat.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 7a6626351ed7..7f0a917ab858 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6824,25 +6824,22 @@ 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
@@ -7037,7 +7034,7 @@ 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