From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753102AbaH2JOt (ORCPT ); Fri, 29 Aug 2014 05:14:49 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:36067 "EHLO mailhub1.si.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752974AbaH2JOn (ORCPT ); Fri, 29 Aug 2014 05:14:43 -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 v2 19/19] powerpc/8xx: Don't restore regs to save them again. Message-Id: <20140829091440.C97981ABD65@localhost.localdomain> Date: Fri, 29 Aug 2014 11:14:40 +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 bb7c816..e21f0b2 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -381,8 +381,7 @@ InstructionTLBMiss: lwz r3, 8(r0) #endif mfspr r10, SPRN_SPRG_SCRATCH2 - EXCEPTION_EPILOG_0 - b InstructionTLBError + b InstructionTLBError1 . = 0x1200 DataStoreTLBMiss: @@ -471,7 +470,10 @@ 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