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=unavailable 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 B6080C4708F for ; Wed, 2 Jun 2021 14:14:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9B7AE61400 for ; Wed, 2 Jun 2021 14:14:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232183AbhFBOQB (ORCPT ); Wed, 2 Jun 2021 10:16:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35176 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231846AbhFBOO2 (ORCPT ); Wed, 2 Jun 2021 10:14:28 -0400 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA205C061761; Wed, 2 Jun 2021 07:12:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=FzJfBljo4B8RxU2ilIDhSLr34HFST0rQLNCYNw/HW+w=; b=L9vjUarjZTu6NzihPxyvfr9SrD cXp2K8L/lswul4alVU9a5KXYcmiYKaI0pVqEPrOTObk1bWVjIa727CcohFhQnptUDt9rVM7+wZokD bdiAP5TkdYqfBQHbyzuL3QwjL5RpkYojkJ5M5vFeN5hhURZOWxGVnCDXhqvgtesERKVZoPVmmu+1u zvBuQ/5U6yi+c+8BHLKEGRhN8+mOxmjvdNXmQvv5K7kABrgsWq6TQpgiZuniSUsdWGatjG0TQN4HN iyi9j9XYfQaN+mhBZrOglYAeu1Bmuw53jmWdaNNlHNX9gCtb8Ta+n9yUYscEboZQaYK4WTzPQHe3/ 3aLE6Hfw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1loRbc-002uVV-R0; Wed, 02 Jun 2021 14:12:31 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id D44963002A3; Wed, 2 Jun 2021 16:12:30 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id B760020223DA5; Wed, 2 Jun 2021 16:12:30 +0200 (CEST) Date: Wed, 2 Jun 2021 16:12:30 +0200 From: Peter Zijlstra To: Mathieu Desnoyers 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 Subject: Re: [PATCH 4/6] sched: Add get_current_state() Message-ID: References: <20210602131225.336600299@infradead.org> <20210602133040.461908001@infradead.org> <1731339790.5856.1622642489232.JavaMail.zimbra@efficios.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1731339790.5856.1622642489232.JavaMail.zimbra@efficios.com> Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Wed, Jun 02, 2021 at 10:01:29AM -0400, Mathieu Desnoyers wrote: > ----- 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 ? Mostly to be consistent, all that state stuff is macros. I suppose we could try and make them inlines at the end or so -- if the header maze allows.