From b0168eb97b8b02594f47ce44faf1502f79e540df Mon Sep 17 00:00:00 2001 From: LEROY Christophe Date: Fri, 19 Sep 2014 10:36:10 +0200 Subject: [PATCH] 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 Signed-off-by: Scott Wood --- arch/powerpc/kernel/head_8xx.S | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 46b47e1..330d544 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() */ -- 2.7.4