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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 54AFAC3DA59 for ; Mon, 22 Jul 2024 10:30:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=eGtasZHpVCtNwYyXffn1eT0C1efmnjuGl9feRBvaWnk=; b=PuAx/0dXG2Y2YE UjvJYb0+4mvKRoio6YyWl3INYWWp4xLO5fJMvBC02b5/WqjA2pwLaONatLyPt/tCnovXZv4ymnsmT F2tor55dEHIuF6E1ZLXzjBMAPiFlRs8zMlpCQYt10fcJAPXs1FiTPJopTQZC6GYlGH0fmjEkApHjO ERHT+EKkJLtrrsgbhe/4Q28a4RGEHjjs+90lAzxx3cSh6pKhBlN+YLusWa27E/VFRaLLUVTI6DclQ g8FcMDeO7HrvBMnGwNpiFS5rH9dIeFCh0F+/G1cskmXCiv0vuASNsfHP47RnpJZml8NMzw1z36LkT 4Qb4it1JC845oAfAUJ6Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sVqJf-00000009GBm-3yO8; Mon, 22 Jul 2024 10:30:51 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sVqJd-00000009GBL-0K2P for kexec@lists.infradead.org; Mon, 22 Jul 2024 10:30:50 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1721644248; 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=920T09UfGz6bsniIm1Cf50ju0AGe0vceUzq5dRrbSaw=; b=PdKJyWoAf0pGdne+1CKL6NyMuuoKey5RnNqRHnKgI2jF/DuIFJHkOaTakgneEj2NHJp/T5 X3uplXMIjICJZljvK4RhAk3Qa+sKzRnLIGsnLrB4vQ0rLeS7u4AqUl3kGBYl4tlM9qwVXh NqUw8mxye1Fx2yPs8ut1Qw0+/9YYeZ0= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-441-QsRzAvh_OJS8UbRmtQQzbQ-1; Mon, 22 Jul 2024 06:30:44 -0400 X-MC-Unique: QsRzAvh_OJS8UbRmtQQzbQ-1 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 8476A1955F65; Mon, 22 Jul 2024 10:30:43 +0000 (UTC) Received: from localhost (unknown [10.72.112.6]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 112031955F40; Mon, 22 Jul 2024 10:30:41 +0000 (UTC) Date: Mon, 22 Jul 2024 18:30:36 +0800 From: Baoquan He To: Uros Bizjak Cc: akpm@linux-foundation.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, Eric Biederman Subject: Re: [PATCH] kexec: Use atomic_try_cmpxchg_acquire() in kexec_trylock() Message-ID: References: <20240719103937.53742-1-ubizjak@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240722_033049_207243_68EB80B0 X-CRM114-Status: GOOD ( 15.10 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org T24gMDcvMjIvMjQgYXQgMTA6NTNhbSwgVXJvcyBCaXpqYWsgd3JvdGU6Cj4gT24gTW9uLCBKdWwg MjIsIDIwMjQgYXQgNTowOeKAr0FNIEJhb3F1YW4gSGUgPGJoZUByZWRoYXQuY29tPiB3cm90ZToK PiA+Cj4gPiBPbiAwNy8xOS8yNCBhdCAxMjozOHBtLCBVcm9zIEJpemphayB3cm90ZToKPiA+ID4g VXNlIGF0b21pY190cnlfY21weGNoZ19hY3F1aXJlKCpwdHIsICZvbGQsIG5ldykgaW5zdGVhZCBv Zgo+ID4gPiBhdG9taWNfY21weGNoZ19hY3F1aXJlKCpwdHIsIG9sZCwgbmV3KSA9PSBvbGQgaW4g a2V4ZWNfdHJ5bG9jaygpLgo+ID4gPiB4ODYgQ01QWENIRyBpbnN0cnVjdGlvbiByZXR1cm5zIHN1 Y2Nlc3MgaW4gWkYgZmxhZywgc28KPiA+ID4gdGhpcyBjaGFuZ2Ugc2F2ZXMgYSBjb21wYXJlIGFm dGVyIGNtcHhjaGcuCj4gPgo+ID4gU2VlbXMgaXQgY2FuIHNpbXBsaWZ5IGNvZGUgZXZlbiB0aG91 Z2ggb24gbm9uLXg4NiBhcmNoLCBzaG91bGQgd2UKPiA+IHJlcGxhY2UgYXRvbWljX3RyeV9jbXB4 Y2hnX2FjcXVpcmUoKSB3aXRoIGF0b21pY190cnlfY21weGNoZ19hY3F1aXJlKCkKPiA+IGluIGFs bCBzaW1pbGFyIHBsYWNlcz8KPiAKPiBZZXMsIHRoZSBjaGFuZ2UgaXMgYmVuZWZpY2lhbCBhbHNv IGZvciBub24teDg2IGFyY2hpdGVjdHVyZXMsIHBsZWFzZQo+IHNlZSBhbmFseXNpcyBhdCB0aHJl YWQgWzFdLiBJJ3ZlIGJlZW4gbG9va2luZyB0aHJvdWdoIHRoZSBrZXJuZWwKPiBzb3VyY2VzIGZv ciB0aGVzZSBwbGFjZXMgZm9yIHF1aXRlIHNvbWUgdGltZSwgYW5kIEkgYmVsaWV2ZSBJIGhhdmUK PiBjaGFuZ2VkIG1vc3Qgb2YgdGhlIHBsYWNlcy4gVGhlIGNoYW5nZSBpcyByZWxhdGl2ZWx5IHN0 cmFpZ2h0Zm9yd2FyZCwKPiBhbmQgaW1tZWRpYXRlbHkgcmVzdWx0cyBpbiBhIGJldHRlciBjb2Rl Lgo+IAo+IFsxXSBodHRwczovL2xvcmUua2VybmVsLm9yZy9sa21sLzg3MXF3Z21xd3MuZnNmQG1w ZS5lbGxlcm1hbi5pZC5hdS8KCkdvb2QgdG8ga25vdywgdGhhbmtzIGZvciB0ZWxsaW5nLgoKCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmtleGVjIG1haWxp bmcgbGlzdAprZXhlY0BsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQu b3JnL21haWxtYW4vbGlzdGluZm8va2V4ZWMK