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[2620:137:e000::1:20]) by mx.google.com with ESMTP id i68-20020a639d47000000b0055c8ad484a1si6185468pgd.125.2023.08.13.03.03.32; Sun, 13 Aug 2023 03:03:44 -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=@linutronix.de header.s=2020 header.b=0gswTzyH; dkim=neutral (no key) header.i=@linutronix.de; 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=QUARANTINE dis=NONE) header.from=linutronix.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230468AbjHMJII (ORCPT + 99 others); Sun, 13 Aug 2023 05:08:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229582AbjHMJIH (ORCPT ); Sun, 13 Aug 2023 05:08:07 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 347A0170C for ; Sun, 13 Aug 2023 02:08:07 -0700 (PDT) From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1691917684; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Ssv4I1NxHnPTIp5CIJdhY75oD/NKqd/mvxBJ1DoAHc4=; b=0gswTzyHzSS7LLA5vxGtu70t8aXUC/mW5QqCtBArflYBmqUGmDxJF0OMWFn2mNTxJ07XxC w4VV5yrfvu1GmoYO9rLaWhspCpSph9NeUs/+BQKkuHSJ+BeIcfuqskKvEMrJOsByGhYt9P 6mXATMhvB4cNc+hzVP510BnS1Hf9gnl4EqWsNLCANLcIhiaV3oBsOLls+NzwvyV0kzh4pv TH2nmenSg4debUiRC7Rody/6lZO+3JZN4gGVaGePVZA+h44yoXnrSjcbP5ItXoRHxDiuDg Zwuulzo+LTLCYpKPCspxVTC6BoCnzmcGfSZK6L6F2tvcUFuIR8j5rxdUILrYhw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1691917684; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Ssv4I1NxHnPTIp5CIJdhY75oD/NKqd/mvxBJ1DoAHc4=; b=yuDamak9VdMFRbqJyWItx7baBKXqBJmb0X2tFZ0FatHE6wQ0Qy23lPO6NfFG9nfyWT2K66 NcD7YKmQlvtPApBQ== To: Nikolay Borisov , LKML Cc: x86@kernel.org, Borislav Petkov , Ashok Raj , Arjan van de Ven Subject: Re: [patch V2 09/37] x86/microcode/intel: Remove pointless mutex In-Reply-To: References: <20230812194003.682298127@linutronix.de> <20230812195728.069849788@linutronix.de> Date: Sun, 13 Aug 2023 11:08:03 +0200 Message-ID: <87zg2vfgy4.ffs@tglx> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,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 On Sun, Aug 13 2023 at 09:55, Nikolay Borisov wrote: > On 12.08.23 =D0=B3. 22:58 =D1=87., Thomas Gleixner wrote: > > So this function is ultimately invoked from a write to the 'reload'=20 > sysfs file, what about 2 racing writes to this file ? Though if it's=20 > about cpu hotplug then in reload_store() this is handled via=20 > cpus_read_lock I guess so indeed this is correct. 80347cd515ca ("x86/microcode: Remove microcode_mutex")