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: v2.6.27.60~53
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9009994b06f745e914a74a8e9efb3c5bf3612dd7;p=thirdparty%2Fkernel%2Fstable.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: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Willy Tarreau <w@1wt.eu>
---

diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index 2f1ff34460a27..ea1e8cdf33296 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -371,7 +371,7 @@ 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