From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CB270C433E0 for ; Fri, 12 Mar 2021 12:51:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9E7B064FA8 for ; Fri, 12 Mar 2021 12:51:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232317AbhCLMvT (ORCPT ); Fri, 12 Mar 2021 07:51:19 -0500 Received: from pegase1.c-s.fr ([93.17.236.30]:15941 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231774AbhCLMuh (ORCPT ); Fri, 12 Mar 2021 07:50:37 -0500 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 4DxlzH0Cdsz9ttBT; Fri, 12 Mar 2021 13:50:35 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id xmDHT-ixZL3s; Fri, 12 Mar 2021 13:50:34 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 4DxlzG5Swwz9ttDF; Fri, 12 Mar 2021 13:50:34 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id B8F388B813; Fri, 12 Mar 2021 13:50:35 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id H-V_q8h3M6pm; Fri, 12 Mar 2021 13:50:35 +0100 (CET) Received: from po16121vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 7F5DD8B764; Fri, 12 Mar 2021 13:50:35 +0100 (CET) Received: by po16121vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 57AF5675C9; Fri, 12 Mar 2021 12:50:35 +0000 (UTC) Message-Id: <20d52c627303d63e461797df13e6890fc04017d0.1615552867.git.christophe.leroy@csgroup.eu> In-Reply-To: References: From: Christophe Leroy Subject: [PATCH v3 25/41] powerpc/32: Don't save thread.regs on interrupt entry To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , npiggin@gmail.com Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Date: Fri, 12 Mar 2021 12:50:35 +0000 (UTC) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since commit 06d67d54741a ("powerpc: make process.c suitable for both 32-bit and 64-bit"), thread.regs is set on task creation, no need to set it again and again at each interrupt entry as it never change. Suggested-by: Nicholas Piggin Signed-off-by: Christophe Leroy --- arch/powerpc/kernel/entry_32.S | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index 79311d0bd09b..1e201fc4a590 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -97,10 +97,8 @@ transfer_to_handler: stw r2,_XER(r11) mfspr r12,SPRN_SPRG_THREAD tovirt(r12, r12) - beq 2f /* if from user, fix up THREAD.regs */ + beq 2f addi r2, r12, -THREAD - addi r11,r1,STACK_FRAME_OVERHEAD - stw r11,PT_REGS(r12) #ifdef CONFIG_PPC_BOOK3S_32 kuep_lock r11, r12 #endif @@ -147,7 +145,6 @@ transfer_to_syscall: /* Calling convention has r9 = orig r0, r10 = regs */ addi r10,r1,STACK_FRAME_OVERHEAD mr r9,r0 - stw r10,THREAD+PT_REGS(r2) bl system_call_exception ret_from_syscall: -- 2.25.0