From patchwork Wed Oct 19 22:46:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Paul E. McKenney" X-Patchwork-Id: 13012448 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 314BAC433FE for ; Wed, 19 Oct 2022 22:47:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230398AbiJSWrH (ORCPT ); Wed, 19 Oct 2022 18:47:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230282AbiJSWrE (ORCPT ); Wed, 19 Oct 2022 18:47:04 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91E0317C167; Wed, 19 Oct 2022 15:47:03 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 514B7B8261A; Wed, 19 Oct 2022 22:47:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EB837C433B5; Wed, 19 Oct 2022 22:47:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1666219621; bh=XdRd/D7YtnjF/VbtVQdPblQxfOL6jWA9yUi4elYsgMo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CATtEuYG11NQ97X+dUT5iqaZitwvMN1GjLxxebL7NPDD4dxFA0yPhlkM/csd1ceU0 5YpYWBZTlDcIDBhwd6d0OdN3MkPVI2tLW93lrNsg8w9aKtopPk/i42xNiXpnSQrikF 9opL8UGvgpS2dC64Wl4SQKHNG9djEdMGQzGo5+nqC2ZAE0qEe7BEwQ9bVoEDpM1P1I zqxyAoxz6PzHlS9NsFx7aMOnhGD5niqY5M1NnljreFhSr0HeZEDtpzzYi5U1llCaEK 2fsg1/4UBIGvOSBX7KbTKIxuiO9jPari1IRNCcENz39AozIrPniJi6mGm6EzuGUpMZ pDSXKJwdKXczw== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id A93345C0890; Wed, 19 Oct 2022 15:47:00 -0700 (PDT) From: "Paul E. McKenney" To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com, rostedt@goodmis.org, Zeng Heng , Mukesh Ojha , "Paul E . McKenney" Subject: [PATCH rcu 3/8] rcu: Remove unused 'cpu' in rcu_virt_note_context_switch() Date: Wed, 19 Oct 2022 15:46:54 -0700 Message-Id: <20221019224659.2499511-3-paulmck@kernel.org> X-Mailer: git-send-email 2.31.1.189.g2e36527f23 In-Reply-To: <20221019224652.GA2499358@paulmck-ThinkPad-P17-Gen-1> References: <20221019224652.GA2499358@paulmck-ThinkPad-P17-Gen-1> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org From: Zeng Heng This commit removes the unused function argument 'cpu'. This does not change functionality, but might save a cycle or two. Signed-off-by: Zeng Heng Acked-by: Mukesh Ojha Signed-off-by: Paul E. McKenney --- include/linux/kvm_host.h | 2 +- include/linux/rcutiny.h | 2 +- include/linux/rcutree.h | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 32f259fa58013..381b92d146c71 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -416,7 +416,7 @@ static __always_inline void guest_context_enter_irqoff(void) */ if (!context_tracking_guest_enter()) { instrumentation_begin(); - rcu_virt_note_context_switch(smp_processor_id()); + rcu_virt_note_context_switch(); instrumentation_end(); } } diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h index 768196a5f39d6..9bc025aa79a30 100644 --- a/include/linux/rcutiny.h +++ b/include/linux/rcutiny.h @@ -142,7 +142,7 @@ static inline int rcu_needs_cpu(void) * Take advantage of the fact that there is only one CPU, which * allows us to ignore virtualization-based context switches. */ -static inline void rcu_virt_note_context_switch(int cpu) { } +static inline void rcu_virt_note_context_switch(void) { } static inline void rcu_cpu_stall_reset(void) { } static inline int rcu_jiffies_till_stall_check(void) { return 21 * HZ; } static inline void rcu_irq_exit_check_preempt(void) { } diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h index 5efb51486e8af..70795386b9ffa 100644 --- a/include/linux/rcutree.h +++ b/include/linux/rcutree.h @@ -27,7 +27,7 @@ void rcu_cpu_stall_reset(void); * wrapper around rcu_note_context_switch(), which allows TINY_RCU * to save a few bytes. The caller must have disabled interrupts. */ -static inline void rcu_virt_note_context_switch(int cpu) +static inline void rcu_virt_note_context_switch(void) { rcu_note_context_switch(false); }