From: Michael Neuling <mikey@neuling.org>
Date: Fri, 28 Mar 2014 05:40:33 +0000 (+1100)
Subject: powerpc/tm: Remove unnecessary r1 save
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=ce0ac1fc326b6a4116728be933ff46d75269baa1;p=openwrt%2Fstaging%2Fblogic.git

powerpc/tm: Remove unnecessary r1 save

We save r1 to the scratch SPR and restore it from there after the trechkpt so
saving r1 to the paca is not needed.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

diff --git a/arch/powerpc/kernel/tm.S b/arch/powerpc/kernel/tm.S
index 03567c05950a..0535c7fdd12c 100644
--- a/arch/powerpc/kernel/tm.S
+++ b/arch/powerpc/kernel/tm.S
@@ -320,8 +320,6 @@ _GLOBAL(__tm_recheckpoint)
 	 */
 	SAVE_NVGPRS(r1)
 
-	std	r1, PACAR1(r13)
-
 	/* Load complete register state from ts_ckpt* registers */
 
 	addi	r7, r3, PT_CKPT_REGS		/* Thread's ckpt_regs */