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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 DDE80C4708F for ; Wed, 2 Jun 2021 14:01:34 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8414C613E4 for ; Wed, 2 Jun 2021 14:01:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8414C613E4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=efficios.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 051CE6B006C; Wed, 2 Jun 2021 10:01:34 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id F1C356B006E; Wed, 2 Jun 2021 10:01:33 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D47806B0070; Wed, 2 Jun 2021 10:01:33 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0018.hostedemail.com [216.40.44.18]) by kanga.kvack.org (Postfix) with ESMTP id 9F1A16B006C for ; Wed, 2 Jun 2021 10:01:33 -0400 (EDT) Received: from smtpin20.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 36F96DE1F for ; Wed, 2 Jun 2021 14:01:33 +0000 (UTC) X-FDA: 78208946466.20.0B745B4 Received: from mail.efficios.com (mail.efficios.com [167.114.26.124]) by imf16.hostedemail.com (Postfix) with ESMTP id 885398019722 for ; Wed, 2 Jun 2021 14:01:18 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mail.efficios.com (Postfix) with ESMTP id 805643029EA; Wed, 2 Jun 2021 10:01:30 -0400 (EDT) Received: from mail.efficios.com ([127.0.0.1]) by localhost (mail03.efficios.com [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id 5aXZqKFUnM5u; Wed, 2 Jun 2021 10:01:29 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mail.efficios.com (Postfix) with ESMTP id 78F88302B31; Wed, 2 Jun 2021 10:01:29 -0400 (EDT) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.efficios.com 78F88302B31 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=efficios.com; s=default; t=1622642489; bh=ildkMTk0vYSZK39yeI6C0NluRoGntZ1yA5EuqMA4g8k=; h=Date:From:To:Message-ID:MIME-Version; b=L/w8o2fJN3kmP73a2vMCtFWwO5YPeIOe9ZmTydEyFWmyEaOlcyFybIdRWoe8hmy34 bHqWF5FDpTTdDr9jNR/6ossgQUg8/lo1uSvmOEMQI+8PvcMWXQjFHlESOaJErckXTB oIuIBEBiJQ9FvKa8qYSLXZLHpWnciBfTelSzOSmbORnUr52zBvJXfWQpx94UqNlbmY Y6yF4/4xX5ToklNVtEYeJ+rmH/TXxAzWx0JJ6vQD3FMua0nJmkIgpXS7yGiTDiDM65 T6y687zdG38LDyLZ4Slpb06ysgcGN+OXRe4bfPmRBCeqmhnbNwAWPu5258Lpn1Ta7C 10t9Cfwl8X+bQ== X-Virus-Scanned: amavisd-new at efficios.com Received: from mail.efficios.com ([127.0.0.1]) by localhost (mail03.efficios.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 6Pg28DJCgmhR; Wed, 2 Jun 2021 10:01:29 -0400 (EDT) Received: from mail03.efficios.com (mail03.efficios.com [167.114.26.124]) by mail.efficios.com (Postfix) with ESMTP id 44D173029E9; Wed, 2 Jun 2021 10:01:29 -0400 (EDT) Date: Wed, 2 Jun 2021 10:01:29 -0400 (EDT) From: Mathieu Desnoyers To: Peter Zijlstra Cc: Thomas Gleixner , Ingo Molnar , Juri Lelli , Vincent Guittot , Dietmar Eggemann , rostedt , Ben Segall , Mel Gorman , bristot , Borislav Petkov , x86 , "H. Peter Anvin" , Jens Axboe , Alasdair Kergon , Mike Snitzer , dm-devel , "David S. Miller" , Jakub Kicinski , Felipe Balbi , Greg Kroah-Hartman , Alexander Viro , Tejun Heo , Zefan Li , Johannes Weiner , Jason Wessel , Daniel Thompson , Douglas Anderson , acme , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , "Rafael J. Wysocki" , Pavel Machek , Will Deacon , Waiman Long , Boqun Feng , Oleg Nesterov , Davidlohr Bueso , paulmck , Josh Triplett , Lai Jiangshan , "Joel Fernandes, Google" , John Stultz , Stephen Boyd , Andrew Morton , Paolo Bonzini , linux-kernel , linux-block , netdev , linux-usb , linux-fsdevel , cgroups , kgdb-bugreport , linux-perf-users , linux-pm , rcu , linux-mm , KVM list Message-ID: <1731339790.5856.1622642489232.JavaMail.zimbra@efficios.com> In-Reply-To: <20210602133040.461908001@infradead.org> References: <20210602131225.336600299@infradead.org> <20210602133040.461908001@infradead.org> Subject: Re: [PATCH 4/6] sched: Add get_current_state() MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [167.114.26.124] X-Mailer: Zimbra 8.8.15_GA_4018 (ZimbraWebClient - FF88 (Linux)/8.8.15_GA_4026) Thread-Topic: sched: Add get_current_state() Thread-Index: E1ntXBdpTHBBRaSFxkm2wa7EtTrnhg== Authentication-Results: imf16.hostedemail.com; dkim=pass header.d=efficios.com header.s=default header.b="L/w8o2fJ"; dmarc=pass (policy=none) header.from=efficios.com; spf=pass (imf16.hostedemail.com: domain of compudj@efficios.com designates 167.114.26.124 as permitted sender) smtp.mailfrom=compudj@efficios.com X-Stat-Signature: rjw84yt515c1u6cyux1ouxcxxwis6654 X-Rspamd-Queue-Id: 885398019722 X-Rspamd-Server: rspam02 X-HE-Tag: 1622642478-862218 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: ----- On Jun 2, 2021, at 9:12 AM, Peter Zijlstra peterz@infradead.org wrote: > Remove yet another few p->state accesses. [...] > > --- a/include/linux/sched.h > +++ b/include/linux/sched.h > @@ -212,6 +212,8 @@ struct task_group; > > #endif > > +#define get_current_state() READ_ONCE(current->state) Why use a macro rather than a static inline here ? Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com