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=-3.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 6924BC2D0F8 for ; Tue, 12 May 2020 22:25:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4CE2D24927 for ; Tue, 12 May 2020 22:25:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732077AbgELWZh (ORCPT ); Tue, 12 May 2020 18:25:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55494 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1731674AbgELWXN (ORCPT ); Tue, 12 May 2020 18:23:13 -0400 Received: from Galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32223C061A0C for ; Tue, 12 May 2020 15:23:13 -0700 (PDT) Received: from p5de0bf0b.dip0.t-ipconnect.de ([93.224.191.11] helo=nanos.tec.linutronix.de) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1jYdIC-0004gW-Rb; Wed, 13 May 2020 00:22:29 +0200 Received: from nanos.tec.linutronix.de (localhost [IPv6:::1]) by nanos.tec.linutronix.de (Postfix) with ESMTP id 4E8FD1001FC; Wed, 13 May 2020 00:22:28 +0200 (CEST) Message-Id: <20200512213810.212055069@linutronix.de> User-Agent: quilt/0.65 Date: Tue, 12 May 2020 23:01:07 +0200 From: Thomas Gleixner To: LKML Cc: x86@kernel.org, "Paul E. McKenney" , Andy Lutomirski , Alexandre Chartre , Frederic Weisbecker , Paolo Bonzini , Sean Christopherson , Masami Hiramatsu , Petr Mladek , Steven Rostedt , Joel Fernandes , Boris Ostrovsky , Juergen Gross , Brian Gerst , Mathieu Desnoyers , Josh Poimboeuf , Will Deacon , Tom Lendacky , Wei Liu , Michael Kelley , Jason Chen CJ , Zhao Yakui , "Peter Zijlstra (Intel)" Subject: [patch V5 08/38] x86/entry: Split idtentry_enter/exit() References: <20200512210059.056244513@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-transfer-encoding: 8-bit X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Split the implementation of idtentry_enter/exit() out into inline functions so that variants of idtentry_enter/exit() can be implemented without duplicating code. Signed-off-by: Thomas Gleixner --- arch/x86/entry/common.c | 37 +++++++++++++++++++++---------------- 1 file changed, 21 insertions(+), 16 deletions(-) --- a/arch/x86/entry/common.c +++ b/arch/x86/entry/common.c @@ -539,22 +539,7 @@ void noinstr idtentry_enter(struct pt_re } } -/** - * idtentry_exit - Common code to handle return from exceptions - * @regs: Pointer to pt_regs (exception entry regs) - * - * Depending on the return target (kernel/user) this runs the necessary - * preemption and work checks if possible and required and returns to - * the caller with interrupts disabled and no further work pending. - * - * This is the last action before returning to the low level ASM code which - * just needs to return to the appropriate context. - * - * Invoked by all exception/interrupt IDTENTRY handlers which are not - * returning through the paranoid exit path (all except NMI, #DF and the IST - * variants of #MC and #DB) and are therefore on the thread stack. - */ -void noinstr idtentry_exit(struct pt_regs *regs) +static __always_inline void __idtentry_exit(struct pt_regs *regs) { lockdep_assert_irqs_disabled(); @@ -610,3 +595,23 @@ void noinstr idtentry_exit(struct pt_reg rcu_irq_exit(); } } + +/** + * idtentry_exit - Common code to handle return from exceptions + * @regs: Pointer to pt_regs (exception entry regs) + * + * Depending on the return target (kernel/user) this runs the necessary + * preemption and work checks if possible and required and returns to + * the caller with interrupts disabled and no further work pending. + * + * This is the last action before returning to the low level ASM code which + * just needs to return to the appropriate context. + * + * Invoked by all exception/interrupt IDTENTRY handlers which are not + * returning through the paranoid exit path (all except NMI, #DF and the IST + * variants of #MC and #DB) and are therefore on the thread stack. + */ +void noinstr idtentry_exit(struct pt_regs *regs) +{ + __idtentry_exit(regs); +}