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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id F053DC433F5 for ; Fri, 13 May 2022 14:09:43 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 48FD26B0073; Fri, 13 May 2022 10:09:43 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 440016B0075; Fri, 13 May 2022 10:09:43 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2E13A6B0078; Fri, 13 May 2022 10:09:43 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 210876B0073 for ; Fri, 13 May 2022 10:09:43 -0400 (EDT) Received: from smtpin06.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id EEFD7617AF for ; Fri, 13 May 2022 14:09:42 +0000 (UTC) X-FDA: 79460903004.06.2350C38 Received: from mail-yw1-f173.google.com (mail-yw1-f173.google.com [209.85.128.173]) by imf23.hostedemail.com (Postfix) with ESMTP id D56CE1400B1 for ; Fri, 13 May 2022 14:09:27 +0000 (UTC) Received: by mail-yw1-f173.google.com with SMTP id 00721157ae682-2ef5380669cso91302037b3.9 for ; Fri, 13 May 2022 07:09:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=JCXM+3GRl7eC4BUeEhMl6/2Z9riSjU4WXO+ln6A3V7w=; b=iF239hiig5yy4SfYQD0INxyKfRsUamnGXOMkktzXAkkn10MQnGbqWqg6oNotFWPBeS NVC8lXk1nB16LBxAgvZvQan0Tp1G79db2ZgeSraXuYnf74ybib6BaGChUMlX4NdKAhwF xB9KDAI4bH9KE3213Ws+3djIGy0UY/0z8G0aCCUTkGJ6BZk678HODDDbZXqGJI0LAV7b vHihPc9tHW3keSSufH8DKZtemGr9BY1u2wnbdIJUotexVvTgFGVytAfBtJlyJXBVIPZQ SRv2OjUqxMfWzfNZkQttV8bMEgqwh1jTTIyvg398EYCvA0V67QPr7fdXhJ7u4hiqy2xN CH8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=JCXM+3GRl7eC4BUeEhMl6/2Z9riSjU4WXO+ln6A3V7w=; b=yTfoF8+HRgtYxC9iS9RgjKiDmkqwno6owWbhiuA89cDYhOzg2Pibly+sPWhXS/LyPV YCuUGrY0fDdQ5EJFPkj/7t5lSc/huWTn5qL3yY4H3reBahpUaRgE5XT6Pl8dRV8tOXl0 4xLXEWIWwwhcoiV8oBs/0uc2/y1Y+J1M0WUFVbkmFAb0+4B0WSIkX/yHxdgS/uA6gLB9 gb2jN5zbWgNxaZRI6GUnMYY7qBK7oJM0adf1oxgt4rRkh1PO80VCVl2af2afz46uBmwb HlqMudaUSHekyDDluT1kT4ZuSXimo2vhVWnElYbSvM+ehFNv/RklR9OyT/1cTDHyyhLZ wRMw== X-Gm-Message-State: AOAM533QthxAgjXwzkpfH7YLJJ0YHlt+vw4TqKNxU43XXkXm4Eh4uvZQ cnKF/5B/fuKDfemr45qgfK6gfacG3NBoRcJbR2NRRA== X-Google-Smtp-Source: ABdhPJz2V8zZvBMU6G3F/9R2jJevjr/icGDMryNkI3uRMje+AZLxrnAcL66yFf9xnszg/LVlRVVApFx/yk0AwBnxBOg= X-Received: by 2002:a0d:e946:0:b0:2f8:e7d8:8270 with SMTP id s67-20020a0de946000000b002f8e7d88270mr5794254ywe.344.1652450981681; Fri, 13 May 2022 07:09:41 -0700 (PDT) MIME-Version: 1.0 References: <20220511022751.65540-1-kirill.shutemov@linux.intel.com> <20220511022751.65540-5-kirill.shutemov@linux.intel.com> In-Reply-To: <20220511022751.65540-5-kirill.shutemov@linux.intel.com> From: Alexander Potapenko Date: Fri, 13 May 2022 16:09:05 +0200 Message-ID: Subject: Re: [RFCv2 03/10] x86: Introduce userspace API to handle per-thread features To: "Kirill A. Shutemov" Cc: Dave Hansen , Andy Lutomirski , Peter Zijlstra , "the arch/x86 maintainers" , Andrey Ryabinin , Dmitry Vyukov , "H . J . Lu" , Andi Kleen , Rick Edgecombe , Linux Memory Management List , LKML Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: D56CE1400B1 X-Stat-Signature: wg41et1fnhc3axaahosx5qxbx4wosrzw X-Rspam-User: Authentication-Results: imf23.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=iF239hii; spf=pass (imf23.hostedemail.com: domain of glider@google.com designates 209.85.128.173 as permitted sender) smtp.mailfrom=glider@google.com; dmarc=pass (policy=reject) header.from=google.com X-HE-Tag: 1652450967-910070 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: > + > + /* Handle ARCH_THREAD_FEATURE_ENABLE */ > + > + task->thread.features |= features; > +out: > + return task->thread.features; Isn't arch_prctl() supposed to return 0 on success?