linux-kernel - [PATCH 2/2] mm: remove_memory: Fix end

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Date:	Fri,  8 Mar 2013 08:41:41 -0700
From:	Toshi Kani <toshi.kani@...com>
To:	akpm@...ux-foundation.org
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	isimatu.yasuaki@...fujitsu.com, wency@...fujitsu.com,
	tangchen@...fujitsu.com, Toshi Kani <toshi.kani@...com>
Subject: [PATCH 2/2] mm: remove_memory: Fix end_pfn setting

remove_memory() calls walk_memory_range() with [start_pfn, end_pfn),
where end_pfn is exclusive in this range.  Therefore, end_pfn needs
to be set to the next page of the end address.

Signed-off-by: Toshi Kani <toshi.kani@...com>
---
 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 ae7bcba..3e2ab7b 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1801,7 +1801,7 @@ int __ref remove_memory(int nid, u64 start, u64 size)
 	int retry = 1;
 
 	start_pfn = PFN_DOWN(start);
-	end_pfn = start_pfn + PFN_DOWN(size);
+	end_pfn = PFN_UP(start + size - 1);
 
 	/*
 	 * When CONFIG_MEMCG is on, one memory block may be used by other
--
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