From: Roel Kluin <roel.kluin@gmail.com>
Date: Sun, 1 Nov 2009 14:33:06 +0000 (+0100)
Subject: m32r: Should index be positive?
X-Git-Tag: v2.6.32-rc7~76^2
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=45cdd473301aae36e1f10664b9fe7ef5aad3f182;p=~shefty%2Frdma-dev.git

m32r: Should index be positive?

Index `ipi_num' is signed, test whether it is negative to
make sure we don't get a negative array element.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
---

diff --git a/arch/m32r/kernel/smp.c b/arch/m32r/kernel/smp.c
index 8a88f1f0a3e..31cef20b299 100644
--- a/arch/m32r/kernel/smp.c
+++ b/arch/m32r/kernel/smp.c
@@ -806,7 +806,7 @@ unsigned long send_IPI_mask_phys(cpumask_t physid_mask, int ipi_num,
 
 	if (mask & ~physids_coerce(phys_cpu_present_map))
 		BUG();
-	if (ipi_num >= NR_IPIS)
+	if (ipi_num >= NR_IPIS || ipi_num < 0)
 		BUG();
 
 	mask <<= IPI_SHIFT;