[PATCH] powerpc: paste - Mask XERSO bit in CR

[Haren Myneni]

NX can set 3rd bit in CR register for XER[SO] (Summation overflow)
which is not used for paste return value. So. mask this bit to get
proper return status.
    
Signed-off-by: Haren Myneni <haren at us.ibm.com>

diff --git a/arch/powerpc/platforms/powernv/copy-paste.h b/arch/powerpc/platforms/powernv/copy-paste.h
index c9a5036..82392e3 100644
--- a/arch/powerpc/platforms/powernv/copy-paste.h
+++ b/arch/powerpc/platforms/powernv/copy-paste.h
@@ -9,7 +9,8 @@
 #include <asm/ppc-opcode.h>
 
 #define CR0_SHIFT	28
-#define CR0_MASK	0xF
+#define CR0_MASK	0xE /* 3rd bit undefined or set for XER[SO] */
+
 /*
  * Copy/paste instructions:
  *