linux-kernel - [PATCH 1/1] mm: fix type information of memoryless node

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Date:	Sat, 29 Aug 2015 15:34:45 +0800
From:	Zhen Lei <thunder.leizhen@...wei.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...e.com>, Tejun Heo <tj@...nel.org>,
	Johannes Weiner <hannes@...xchg.org>,
	"Vladimir Davydov" <vdavydov@...allels.com>,
	Joonsoo Kim <js1304@...il.com>, linux-mm <linux-mm@...ck.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
CC:	Zefan Li <lizefan@...wei.com>, Xinwei Hu <huxinwei@...wei.com>,
	"Tianhong Ding" <dingtianhong@...wei.com>,
	Hanjun Guo <guohanjun@...wei.com>,
	Zhen Lei <thunder.leizhen@...wei.com>
Subject: [PATCH 1/1] mm: fix type information of memoryless node

For a memoryless node, the output of get_pfn_range_for_nid are all zero.
It will display mem from 0 to -1.

Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
---
 mm/page_alloc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5b5240b..5839f31 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5455,7 +5455,8 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
 	get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
 	pr_info("Initmem setup node %d [mem %#018Lx-%#018Lx]\n", nid,
-		(u64)start_pfn << PAGE_SHIFT, ((u64)end_pfn << PAGE_SHIFT) - 1);
+		(u64)start_pfn << PAGE_SHIFT,
+		end_pfn ? ((u64)end_pfn << PAGE_SHIFT) - 1 : 0);
 #endif
 	calculate_node_totalpages(pgdat, start_pfn, end_pfn,
 				  zones_size, zholes_size);
--
2.5.0


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