linux-kernel - [PATCH] mm: use early_pfn_to_nid in register_page_bootmem_info

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Date:	Wed, 25 May 2016 14:00:07 -0700
From:	Yang Shi <yang.shi@...aro.org>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linaro-kernel@...ts.linaro.org, yang.shi@...aro.org
Subject: [PATCH] mm: use early_pfn_to_nid in register_page_bootmem_info_node

register_page_bootmem_info_node() is invoked in mem_init(), so it will be
called before page_alloc_init_late() if CONFIG_DEFERRED_STRUCT_PAGE_INIT
is enabled. But, pfn_to_nid() depends on memmap which won't be fully setup
until page_alloc_init_late() is done, so replace pfn_to_nid() by
early_pfn_to_nid().

Signed-off-by: Yang Shi <yang.shi@...aro.org>
---
 mm/memory_hotplug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index caf2a14..b8ee080 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -300,7 +300,7 @@ void register_page_bootmem_info_node(struct pglist_data *pgdat)
 		 * multiple nodes we check that this pfn does not already
 		 * reside in some other nodes.
 		 */
-		if (pfn_valid(pfn) && (pfn_to_nid(pfn) == node))
+		if (pfn_valid(pfn) && (early_pfn_to_nid(pfn) == node))
 			register_page_bootmem_info_section(pfn);
 	}
 }
-- 
2.0.2