From patchwork Fri Aug 11 17:00:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frederic Weisbecker X-Patchwork-Id: 134625 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b824:0:b0:3f2:4152:657d with SMTP id z4csp1258601vqi; Fri, 11 Aug 2023 10:49:50 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHaM6nllqHzr5TRNZruKJmyAK3qLjlvtrTAQGu95NzAKN3jZnfGJOfgC23yaUV7DD5KgzMv X-Received: by 2002:aa7:da4c:0:b0:523:ca05:6528 with SMTP id w12-20020aa7da4c000000b00523ca056528mr1794600eds.12.1691776190084; Fri, 11 Aug 2023 10:49:50 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1691776190; cv=none; d=google.com; s=arc-20160816; b=WiEH+shTwa1qBo5welZPTjt6XmLosLcX1+h/0abhaDPpb1z9l/gd1tSUnTDRaxk6BL hU4VL2CsRKZJt1wj4do+QIYuiHB/Y3qDPmCkhlzN2phN5KgXQjd8DVjXmfifAoMXQXe7 uWZTdpeo3ejwAjoAgDRy6doEpPpZ4An00/5R1O6bNp28DQc9TePMJN1xhZZiTWHzjBtH qYLLRcq90qx+U1BOH80b6uErq/Spezo63PDj1+/C7Chzvc5NlFTmTU6Z4un74GENqm+k NbkRjTJvnSQMN0zZr1Cc03rccdRHTHARtksunLBhKj1XXDhmaDBjxxKO8h0TGCngNG63 TLcA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=h9jpzNoyji8s+VCgxNCeWarE0fnvpyGSAILy/5QpYLs=; fh=K1m6n+brToPLMsYko3rtXKxC+lCostu9M84onRqB7cU=; b=T9U6NdYrZZAliL8pn2xvIqex0QE4fnLHeoles0A/P6QKqqO8+6N7UAZ1v/tjd6GBzN aKgLR868NW4+EU0nFsavok9iQ0C319BUAUwEU9tfpsV3UU0efmEmfNLQL6EreBxSOkA9 PXsVtKBWM18xxdP/BewYGeTU+GdaILsZ7G5q/mYUB1Ry1z0apBPKZdTpiQCEQFizJ5zs P8cmPlcvQ5LxPc3V4emDT9693VrlrXxxtYrAKoskW51yYO+6SeyHJxpxEtUm4+78eTTS 2rzQkGRR9FiLOgEKhVTKGRprfyxfH8a25WZRA3hE7sKmnj+4kwWVWLzjd1BvZNn4y0iD 6atA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=ZV58pxKm; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id d7-20020aa7d5c7000000b0052322eb7739si3761908eds.33.2023.08.11.10.49.25; Fri, 11 Aug 2023 10:49:50 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=ZV58pxKm; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236558AbjHKRBk (ORCPT + 99 others); Fri, 11 Aug 2023 13:01:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57196 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236229AbjHKRBQ (ORCPT ); Fri, 11 Aug 2023 13:01:16 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA45530F0 for ; Fri, 11 Aug 2023 10:01:13 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 7A59B67759 for ; Fri, 11 Aug 2023 17:01:13 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 44C77C433CA; Fri, 11 Aug 2023 17:01:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1691773272; bh=U6FUfmWsk+FhGtzYnlY3GoE5tLhV5tMKcMnNpThTCkM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZV58pxKmzLSPMaZiCldsycJVqKgIEqoKHshWDQ8vgXi1SSW2VWucBhgjWu0xTUAfX pJRibgZKZPYK7uZQPAIniijse8V4bO/cabLnzly0V7fwRfipt0EweNB8BM0mzbR8q9 +WfUOBx/78Qwz7EYKih5hY6fmZLBv1mPX8+oaa8JG8vBgNNUAGPfdGgxklEqOTjubV MGSzQA7TiORxR1kMRo5VA6drktmP7P/Usn0lNP8qIZIRNSo4KR4j5NwJzua0IDSjSW dmL1lK9qdaQsOE0Q66DOfOwtOzDD3elojxy+XAnIIVxxT5Iw2ee9Zi0H+2BAUfWR5A qWldTTNg4CfQw== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Peter Zijlstra , "Rafael J . Wysocki" , Daniel Lezcano , Thomas Gleixner , Anna-Maria Behnsen Subject: [PATCH 08/10] x86: Remove __current_clr_polling() from mwait_idle() Date: Fri, 11 Aug 2023 19:00:47 +0200 Message-Id: <20230811170049.308866-9-frederic@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230811170049.308866-1-frederic@kernel.org> References: <20230811170049.308866-1-frederic@kernel.org> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773955910251652109 X-GMAIL-MSGID: 1773955910251652109 mwait_idle() is only ever called through by cpuidle, either from default_idle_call() or from cpuidle_enter(). In any case cpuidle_idle_call() sets again TIF_NR_POLLING after calling it so there is no point for this atomic operation upon idle exit. Signed-off-by: Frederic Weisbecker Acked-by: Rafael J. Wysocki --- arch/x86/kernel/process.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 72015dba72ab..f1eb769770b1 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -918,7 +918,6 @@ static __cpuidle void mwait_idle(void) raw_local_irq_disable(); } } - __current_clr_polling(); } void select_idle_routine(const struct cpuinfo_x86 *c)