From: LEROY Christophe <christophe.leroy@c-s.fr>
Date: Fri, 19 Sep 2014 08:36:10 +0000 (+0200)
Subject: powerpc/8xx: Don't restore regs to save them again.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b0168eb97b8b02594f47ce44faf1502f79e540df;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

powerpc/8xx: Don't restore regs to save them again.

There is not need to restore r10, r11 and cr registers at this end of ITLBmiss
handler as they are saved again to the same place in ITLBError handler we are
jumping to.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <scottwood@freescale.com>
---

diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 46b47e1fe2a9..330d54418494 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -383,8 +383,7 @@ InstructionTLBMiss:
 	lwz	r3, 8(r0)
 #endif
 	mfspr	r10, SPRN_SPRG_SCRATCH2
-	EXCEPTION_EPILOG_0
-	b	InstructionTLBError
+	b	InstructionTLBError1
 
 	. = 0x1200
 DataStoreTLBMiss:
@@ -473,7 +472,10 @@ DataStoreTLBMiss:
  */
 	. = 0x1300
 InstructionTLBError:
-	EXCEPTION_PROLOG
+	EXCEPTION_PROLOG_0
+InstructionTLBError1:
+	EXCEPTION_PROLOG_1
+	EXCEPTION_PROLOG_2
 	mr	r4,r12
 	mr	r5,r9
 	/* 0x400 is InstructionAccess exception, needed by bad_page_fault() */