From patchwork Tue Oct 15 21:48:52 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 11191855 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0EFD1139A for ; Tue, 15 Oct 2019 21:49:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E2E282168B for ; Tue, 15 Oct 2019 21:49:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731776AbfJOVs4 (ORCPT ); Tue, 15 Oct 2019 17:48:56 -0400 Received: from mx1.redhat.com ([209.132.183.28]:55892 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726802AbfJOVs4 (ORCPT ); Tue, 15 Oct 2019 17:48:56 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id D72ED18C427F; Tue, 15 Oct 2019 21:48:55 +0000 (UTC) Received: from warthog.procyon.org.uk (ovpn-121-84.rdu2.redhat.com [10.10.121.84]) by smtp.corp.redhat.com (Postfix) with ESMTP id 45B0710027AB; Tue, 15 Oct 2019 21:48:53 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [RFC PATCH 07/21] pipe: Remove redundant wakeup from pipe_write() From: David Howells To: torvalds@linux-foundation.org Cc: dhowells@redhat.com, Casey Schaufler , Stephen Smalley , Greg Kroah-Hartman , nicolas.dichtel@6wind.com, raven@themaw.net, Christian Brauner , dhowells@redhat.com, keyrings@vger.kernel.org, linux-usb@vger.kernel.org, linux-block@vger.kernel.org, linux-security-module@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org Date: Tue, 15 Oct 2019 22:48:52 +0100 Message-ID: <157117613252.15019.4979488404301515759.stgit@warthog.procyon.org.uk> In-Reply-To: <157117606853.15019.15459271147790470307.stgit@warthog.procyon.org.uk> References: <157117606853.15019.15459271147790470307.stgit@warthog.procyon.org.uk> User-Agent: StGit/unknown-version MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.62]); Tue, 15 Oct 2019 21:48:56 +0000 (UTC) Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: Remove a redundant wakeup from pipe_write(). Signed-off-by: David Howells --- fs/pipe.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/fs/pipe.c b/fs/pipe.c index 5a199b249191..289a887f6b5b 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -516,11 +516,6 @@ pipe_write(struct kiocb *iocb, struct iov_iter *from) ret = -ERESTARTSYS; break; } - if (do_wakeup) { - wake_up_interruptible_sync_poll(&pipe->wait, EPOLLIN | EPOLLRDNORM); - kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN); - do_wakeup = 0; - } pipe->waiting_writers++; pipe_wait(pipe); pipe->waiting_writers--;