From: Anton Blanchard <anton@samba.org>
Date: Tue, 26 Jul 2011 18:15:03 +0000 (+0000)
Subject: powerpc: pseries: Fix kexec on machines with more than 4TB of RAM
X-Git-Tag: v2.6.34.12~26
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=115a1e2450fe99918a39fe79cd2de79b4ad012e5;p=karo-tx-linux.git

powerpc: pseries: Fix kexec on machines with more than 4TB of RAM

commit bed9a31527af8ff3dfbad62a1a42815cef4baab7 upstream.

On a box with 8TB of RAM the MMU hashtable is 64GB in size. That
means we have 4G PTEs. pSeries_lpar_hptab_clear was using a signed
int to store the index which will overflow at 2G.

Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---

diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index cf79b46d8f88..7e0eba4745b2 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -372,7 +372,7 @@ static void pSeries_lpar_hptab_clear(void)
 		unsigned long ptel;
 	} ptes[4];
 	long lpar_rc;
-	int i, j;
+	unsigned long i, j;
 
 	/* Read in batches of 4,
 	 * invalidate only valid entries not in the VRMA