Patch "powerpc: Convert cmp to cmpd in idle enter sequence" has been added to the 4.4-stable tree

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

powerpc: Convert cmp to cmpd in idle enter sequence

to the 4.4-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-convert-cmp-to-cmpd-in-idle-enter-sequence.patch
and it can be found in the queue-4.4 subdirectory.

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

From: Segher Boessenkool <[email protected]>
Date: Thu, 6 Oct 2016 13:42:19 +0000
Subject: powerpc: Convert cmp to cmpd in idle enter sequence

From: Segher Boessenkool <[email protected]>

commit 80f23935cadb1c654e81951f5a8b7ceae0acc1b4 upstream.

PowerPC's "cmp" instruction has four operands. Normally people write "cmpw" or "cmpd" for the second cmp operand 0 or 1. But, frequently people forget, and write "cmp" with just three operands.

With older binutils this is silently accepted as if this was "cmpw", while often "cmpd" is wanted. With newer binutils GAS will complain about this for 64-bit code. For 32-bit code it still silently assumes "cmpw" is what is meant.

In this instance the code comes directly from ISA v2.07, including the cmp, but cmpd is correct. Backport to stable so that new toolchains can build old kernels.

---
 arch/powerpc/kernel/idle_power7.S |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -44,7 +44,7 @@
 	std	r0,0(r1);					\
 	ptesync;						\
 	ld	r0,0(r1);					\
-1:	cmp	cr0,r0,r0;					\
+1:	cmpd	cr0,r0,r0;					\
 	bne	1b;						\
 	IDLE_INST;						\
 	b	.

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

queue-4.4/powerpc-convert-cmp-to-cmpd-in-idle-enter-sequence.patch