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 2f1ff34460a27e4e312176471c72aef762da422a..ea1e8cdf3329612c08fa9c680e71332d9457f5a1 100644 (file)
--- 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