Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp3295968imu; Sun, 11 Nov 2018 11:47:57 -0800 (PST) X-Google-Smtp-Source: AJdET5dxO+5WkzODbeTSZmtnQpZhYjBr5oEG71c6fGtrMiCepLOBJePbZ8hTqG0ohbB3EDWOdj+N X-Received: by 2002:a17:902:9043:: with SMTP id w3-v6mr16667335plz.32.1541965677462; Sun, 11 Nov 2018 11:47:57 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1541965677; cv=none; d=google.com; s=arc-20160816; b=YHmGimHa25Rx8XZ4F663wI34pnLduWn+G0NM/cpWfnh1X6s8qSMMf+lIiuGhYyg0B3 kS+EsO3I8NdYeA5j2xSPpulB1sOREAo/PIp4X+vRTsxByZoSZnb7UkBYPdgy/i3Sh414 TQ1HIdz9GR+XSJcZRpyqRS36uZtzhn4J9pm7qRjTeEoMtAvD7IarkG3Zi8+kFTFarx39 s7zVFj+Ek033XB2hO+Tnp0AbD+BtvFVk3qE0s92B/bZu98pYH3zvYelViRw22gpbRM5c y9H3gU7+50u5hLlaNr7WQWRfCkGRgg+ZYEIO2/4crbxNQspm1osewNa4X2obypU8mq+r 2TXg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:references:in-reply-to:date :subject:cc:to:from; bh=Yoc7tpIYLneS9KUqdbvL/51W2SPRGF54szsbo2FL+CQ=; b=lGaCWXdFkd3ppsfIxzu41IyB9Ie+p/ItMKmedOrWRMnQKSZwMCVWiD5fytT9VmsHB6 Jyqb90nDP3q78lN0ToWhY14ZZIJIpqJLsVt+9PLs/8+nNYsWleWRG2l9MNSF0PX7s3HL Xu5BcH4aS5zG2QGNUf0h1tGjkx3+G3ZNd3b1nvppLR4aNWkWOnVFna2wKOz0r+PoXRl1 5z+LmRXWyLx8n6EZssCITOJBtQbT9nFfLhxfYik7Gtv6E684iL257azQWuLlTR/DJEGx 0NhIF9FFi+wvth+sGWZ+eKtUjbfWRBhoguBR+1IkEG/B6fRBchR1un9j5Igzgsn7g5hM w1ag== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=ibm.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id o31si13229346pgb.273.2018.11.11.11.47.42; Sun, 11 Nov 2018 11:47:57 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=ibm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729723AbeKLFfw (ORCPT + 99 others); Mon, 12 Nov 2018 00:35:52 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:44800 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727106AbeKLFdr (ORCPT ); Mon, 12 Nov 2018 00:33:47 -0500 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id wABJi8X3036569 for ; Sun, 11 Nov 2018 14:44:20 -0500 Received: from e12.ny.us.ibm.com (e12.ny.us.ibm.com [129.33.205.202]) by mx0b-001b2d01.pphosted.com with ESMTP id 2npdbnsp82-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Sun, 11 Nov 2018 14:44:20 -0500 Received: from localhost by e12.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Sun, 11 Nov 2018 19:44:20 -0000 Received: from b01cxnp22034.gho.pok.ibm.com (9.57.198.24) by e12.ny.us.ibm.com (146.89.104.199) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Sun, 11 Nov 2018 19:44:14 -0000 Received: from b01ledav003.gho.pok.ibm.com (b01ledav003.gho.pok.ibm.com [9.57.199.108]) by b01cxnp22034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id wABJiDlG62849202 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Sun, 11 Nov 2018 19:44:13 GMT Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 33434B206E; Sun, 11 Nov 2018 19:44:13 +0000 (GMT) Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 12775B2065; Sun, 11 Nov 2018 19:44:13 +0000 (GMT) Received: from paulmck-ThinkPad-W541 (unknown [9.85.207.24]) by b01ledav003.gho.pok.ibm.com (Postfix) with ESMTP; Sun, 11 Nov 2018 19:44:13 +0000 (GMT) Received: by paulmck-ThinkPad-W541 (Postfix, from userid 1000) id CCDAA16C5DA9; Sun, 11 Nov 2018 11:44:12 -0800 (PST) From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org, "Paul E. McKenney" , Alexander Viro , linux-fsdevel@vger.kernel.org Subject: [PATCH tip/core/rcu 17/41] fs/file: Replace synchronize_sched() with synchronize_rcu() Date: Sun, 11 Nov 2018 11:43:46 -0800 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181111194104.GA4787@linux.ibm.com> References: <20181111194104.GA4787@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18111119-0060-0000-0000-000002D0FC33 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010028; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000270; SDB=6.01116019; UDB=6.00578732; IPR=6.00896119; MB=3.00024114; MTD=3.00000008; XFM=3.00000015; UTC=2018-11-11 19:44:18 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18111119-0061-0000-0000-0000472A051A Message-Id: <20181111194410.6368-17-paulmck@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-11-11_13:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1811110188 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that synchronize_rcu() waits for preempt-disable regions of code as well as RCU read-side critical sections, synchronize_sched() can be replaced by synchronize_rcu(). This commit therefore makes this change. Signed-off-by: Paul E. McKenney Cc: Alexander Viro Cc: --- fs/file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/file.c b/fs/file.c index 7ffd6e9d103d..50304c7525ea 100644 --- a/fs/file.c +++ b/fs/file.c @@ -158,7 +158,7 @@ static int expand_fdtable(struct files_struct *files, unsigned int nr) * or have finished their rcu_read_lock_sched() section. */ if (atomic_read(&files->count) > 1) - synchronize_sched(); + synchronize_rcu(); spin_lock(&files->file_lock); if (!new_fdt) -- 2.17.1