From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756470AbaHHHE6 (ORCPT ); Fri, 8 Aug 2014 03:04:58 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:45336 "EHLO mailhub1.si.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756437AbaHHHEz (ORCPT ); Fri, 8 Aug 2014 03:04:55 -0400 From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras CC: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Joakim Tjernlund , scottwood@freescale.com Subject: [PATCH 20/20] powerpc/8xx: Don't restore regs to save them again. Message-Id: <20140808070346.75C8D1ABD50@localhost.localdomain> Date: Fri, 8 Aug 2014 09:03:46 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- arch/powerpc/kernel/head_8xx.S | 8 +++++--- 1 files changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 99438d8..102fe9f 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -380,8 +380,7 @@ InstructionTLBMiss: lwz r3, 8(r0) #endif mfspr r10, SPRN_SPRG_SCRATCH2 - EXCEPTION_EPILOG_0 - b InstructionTLBError + b InstructionTLBError1 . = 0x1200 DataStoreTLBMiss: @@ -470,7 +469,10 @@ DataStoreTLBMiss: */ . = 0x1300 InstructionTLBError: - EXCEPTION_PROLOG + EXCEPTION_PROLOG_0 +InstructionTLBError1: + EXCEPTION_PROLOG_1 + EXCEPTION_PROLOG_2 mr r4,r12 mr r5,r9 EXC_XFER_LITE(0x1300, handle_page_fault) -- 1.7.1