From patchwork Thu Nov 15 01:03:26 2012
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Subject: [1/6] powerpc: Move branch instruction from ACCOUNT_CPU_USER_ENTRY to
 caller
Date: Wed, 14 Nov 2012 15:03:26 -0000
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
X-Patchwork-Id: 199088
Message-Id: <1352941406.23412.40.camel@pasglop>
To: Haren Myneni <haren@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org, mikey@neuling.org, anton@au1.ibm.com,
 paulus@samba.org

On Thu, 2012-11-15 at 11:40 +1100, Benjamin Herrenschmidt wrote:
On Tue, 2012-10-30 at 23:51 -0700, Haren Myneni wrote:
Cheers,
Ben.


--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -159,8 +159,9 @@ exc_##n##_common:                                                       \
        std     r9,GPR9(r1);            /* save r9 in stackframe */         \
        std     r10,_NIP(r1);           /* save SRR0 to stackframe */       \
        std     r11,_MSR(r1);           /* save SRR1 to stackframe */       \
+       beq     1f                      /* if from kernel mode */

Missing semicolon 

Ok, that's not enough. Please test & fix & resend.