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=-13.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 4FC68C433E8 for ; Mon, 13 Jul 2020 23:44:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2BCBA2145D for ; Mon, 13 Jul 2020 23:44:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="tu8y3iLZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726914AbgGMXoC (ORCPT ); Mon, 13 Jul 2020 19:44:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726794AbgGMXn6 (ORCPT ); Mon, 13 Jul 2020 19:43:58 -0400 Received: from mail-ej1-x643.google.com (mail-ej1-x643.google.com [IPv6:2a00:1450:4864:20::643]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA4C8C061755; Mon, 13 Jul 2020 16:43:57 -0700 (PDT) Received: by mail-ej1-x643.google.com with SMTP id dr13so19475477ejc.3; Mon, 13 Jul 2020 16:43:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=5WX6L7s9zCJbAz4+63goRJTZCABfCH31DReSSw3KGQQ=; b=tu8y3iLZhI46qYmfddtRluE6aL11TMyvuYevBslMBOaBKPGJHQSPZj4OMY9OleecPX fxAbOE8nEoo5GvbyrDbXHVkxTrnws6Tb66sT9xhVazdqQHlV4RXzHl7XUGH8OCZGgDnK RNpNTWj18lzfRpMg3ixElf9OovtHqJ8uWwASmV0unpw5CZDIYQ2zLEQhiiFIViGcTyRM s0yun8k/VZHVFE0NkgrdqrIL6oF4YQPa7RMnR7vWaKGE7nobGGFLM5a0s8UHFzlzIUEr guiPsTWY0ANVtZwKBj6WJD7C+RRoqXgFBJKhW+Nt1litqGvrAa74FnGo0ALDP4uexR6q /mlw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=5WX6L7s9zCJbAz4+63goRJTZCABfCH31DReSSw3KGQQ=; b=oYLa8i2pAufqVfluElAZHE+XeUBiNAcJSnwvMORIfa1vy56kPXkJEtPRG93FV3NJfp puX3R0qZAmN9tZcJHPrQf9Kdb74I45bhpsuv2MqD/ehoYtEzd0nrF8UlP//LDbIHr1SA beTB0HTA8DttL+/7UpPPGS1CTwuLhUaLD5jDY/gsyUnIAN9nSuAjpajZ11gV+G1DAtHz qjl18/EQ11QsuRQnEVl3Gd6fHfOdqvRrufk/da2TVgtlg5lhceVS54oV2lcOWfNmb2xy GerfZvkemCRTXG87/5YLiehBwlh4wVV/icqRtvuZENK7Wl1r85/rpeCxDtacCbTEYNzW fCUg== X-Gm-Message-State: AOAM530PMVkG+rDhE/VzYSprC/6EPFms7geRASVsDplT6djDzt7n6EHJ Vc05LTaHebht97zHknx1n5U= X-Google-Smtp-Source: ABdhPJw5Ws5ld6m6hMQ3NQksGZjVbB9yauq8NGAr/TPbmcBYX+dH1G0krl8CKtYCcLJb44cYj1uHuA== X-Received: by 2002:a17:906:328d:: with SMTP id 13mr2009905ejw.71.1594683836475; Mon, 13 Jul 2020 16:43:56 -0700 (PDT) Received: from localhost.localdomain ([5.100.193.69]) by smtp.gmail.com with ESMTPSA id a13sm12964712edk.58.2020.07.13.16.43.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jul 2020 16:43:56 -0700 (PDT) From: Pavel Begunkov To: Jens Axboe , io-uring@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/5] tasks: add put_task_struct_many() Date: Tue, 14 Jul 2020 02:41:55 +0300 Message-Id: <97d4ccff189d1df7e0a7656af40ced2642caef99.1594683622.git.asml.silence@gmail.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org put_task_struct_many() is as put_task_struct() but puts several references at once. Useful to batching it. Signed-off-by: Pavel Begunkov --- include/linux/sched/task.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h index 38359071236a..1301077f9c24 100644 --- a/include/linux/sched/task.h +++ b/include/linux/sched/task.h @@ -126,6 +126,12 @@ static inline void put_task_struct(struct task_struct *t) __put_task_struct(t); } +static inline void put_task_struct_many(struct task_struct *t, int nr) +{ + if (refcount_sub_and_test(nr, &t->usage)) + __put_task_struct(t); +} + void put_task_struct_rcu_user(struct task_struct *task); #ifdef CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT -- 2.24.0