From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756207AbaISJCR (ORCPT ); Fri, 19 Sep 2014 05:02:17 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:54841 "EHLO mailhub1.si.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753985AbaISJCG (ORCPT ); Fri, 19 Sep 2014 05:02:06 -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 v4 08/21] powerpc/8xx: No need to restore registers and save them again. Message-Id: <20140919083608.137241AB019@localhost.localdomain> Date: Fri, 19 Sep 2014 10:36:08 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In DTLBError handler there is not need to restore r10, r11 and cr registers after fixing DAR as they are saved again to the same place just after. Signed-off-by: Christophe Leroy --- Changes in v2: - None Changes in v3: - None Changes in v4: - None arch/powerpc/kernel/head_8xx.S | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 5f04d5f..e5a250c 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -478,8 +478,8 @@ DataTLBError: cmpwi cr0, r11, 0x00f0 beq- FixupDAR /* must be a buggy dcbX, icbi insn. */ DARFixed:/* Return from dcbx instruction bug workaround */ - EXCEPTION_EPILOG_0 - EXCEPTION_PROLOG + EXCEPTION_PROLOG_1 + EXCEPTION_PROLOG_2 mfspr r10,SPRN_DSISR stw r10,_DSISR(r11) mr r5,r10 -- 1.7.1