From: Andrew Hastings <abh@cray.com>
Date: Wed, 17 Oct 2007 16:04:33 +0000 (+0200)
Subject: x86: fix off-by-one in find_next_zero_string
X-Git-Tag: v2.6.24-rc1~476^2~106
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=801916c1b369b637ce799e6c71a94963ff63df79;p=linux-2.6

x86: fix off-by-one in find_next_zero_string

Fix an off-by-one error in find_next_zero_string which prevents
allocating the last bit.

[ tglx: arch/x86 adaptation ]

Signed-off-by: Andrew Hastings <abh@cray.com> on behalf of Cray Inc.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/arch/x86/lib/bitstr_64.c b/arch/x86/lib/bitstr_64.c
index 24676609a6..7445caf1b5 100644
--- a/arch/x86/lib/bitstr_64.c
+++ b/arch/x86/lib/bitstr_64.c
@@ -14,7 +14,7 @@ find_next_zero_string(unsigned long *bitmap, long start, long nbits, int len)
 	
 	/* could test bitsliced, but it's hardly worth it */
 	end = n+len;
-	if (end >= nbits) 
+	if (end > nbits)
 		return -1; 
 	for (i = n+1; i < end; i++) { 
 		if (test_bit(i, bitmap)) {