Patch "powerpc/64s: Remove SAO feature from Power9 DD1" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

powerpc/64s: Remove SAO feature from Power9 DD1

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
powerpc-64s-remove-sao-feature-from-power9-dd1.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Nicholas Piggin <[email protected]>
Date: Wed, 19 Apr 2017 12:27:38 +1000
Subject: powerpc/64s: Remove SAO feature from Power9 DD1

From: Nicholas Piggin <[email protected]>

[ Upstream commit ca80d5d0a8175c9be04cfbce24180b8f5e0a744b ]

Power9 DD1 does not implement SAO. Although it's not widely used, its presence or absence is visible to user space via arch_validate_prot() so it's moderately important that we get the value right.

---
 arch/powerpc/include/asm/cputable.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -474,7 +474,8 @@ enum {
 	    CPU_FTR_ICSWX | CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY | \
 	    CPU_FTR_DBELL | CPU_FTR_HAS_PPR | CPU_FTR_DAWR | \
 	    CPU_FTR_ARCH_207S | CPU_FTR_TM_COMP | CPU_FTR_ARCH_300)
-#define CPU_FTRS_POWER9_DD1 (CPU_FTRS_POWER9 | CPU_FTR_POWER9_DD1)
+#define CPU_FTRS_POWER9_DD1 ((CPU_FTRS_POWER9 | CPU_FTR_POWER9_DD1) & \
+			     (~CPU_FTR_SAO))
 #define CPU_FTRS_CELL	(CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \
 	    CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \
 	    CPU_FTR_ALTIVEC_COMP | CPU_FTR_MMCRA | CPU_FTR_SMT | \

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/powerpc-64s-remove-sao-feature-from-power9-dd1.patch