[PATCH 40/91] powerpc: pseries: Fix kexec on machines with more than 4TB of RAM

From: Willy Tarreau
Date: Sun Feb 05 2012 - 17:36:30 EST

2.6.27-longterm review patch. If anyone has any objections, please let us know.


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@xxxxxxxxx>
Acked-by: Michael Neuling <mikey@xxxxxxxxxxx>
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
arch/powerpc/platforms/pseries/lpar.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

Index: longterm-2.6.27/arch/powerpc/platforms/pseries/lpar.c
--- longterm-2.6.27.orig/arch/powerpc/platforms/pseries/lpar.c 2012-02-05 22:34:33.813915314 +0100
+++ longterm-2.6.27/arch/powerpc/platforms/pseries/lpar.c 2012-02-05 22:34:40.526914898 +0100
@@ -371,7 +371,7 @@
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

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