From f1327bf18c8737aeb85226f02f102dfa065fddde Mon Sep 17 00:00:00 2001
From: Roel Kluin <roel.kluin@gmail.com>
Date: Mon, 14 Dec 2009 17:57:49 -0800
Subject: [PATCH] page-types: unsigned cannot be less than 0 in add_page()

If not signed, testing of the read() return value in this function
will not work.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 Documentation/vm/page-types.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/vm/page-types.c b/Documentation/vm/page-types.c
index 59a4614f4b90..2279b616a7ac 100644
--- a/Documentation/vm/page-types.c
+++ b/Documentation/vm/page-types.c
@@ -560,7 +560,7 @@ static void walk_pfn(unsigned long voffset,
 {
 	uint64_t buf[KPAGEFLAGS_BATCH];
 	unsigned long batch;
-	unsigned long pages;
+	long pages;
 	unsigned long i;
 
 	while (count) {
-- 
2.20.1