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 <redacted>
Cc: <stable@kernel.org>
---

Index: linux-powerpc/arch/powerpc/platforms/pseries/lpar.c
===================================================================

--- linux-powerpc.orig/arch/powerpc/platforms/pseries/lpar.c	2011-07-27 13:50:18.408091576 +1000
+++ linux-powerpc/arch/powerpc/platforms/pseries/lpar.c	2011-07-27 13:51:19.359196131 +1000

@@ -203,7 +203,7 @@ static void pSeries_lpar_hptab_clear(voi
 		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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