From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: [patch 15/67] ipc/mqueue.c: remove duplicated code Date: Mon, 03 Feb 2020 17:34:32 -0800 Message-ID: <20200204013432.adPyN2kx-%akpm@linux-foundation.org> References: <20200203173311.6269a8be06a05e5a4aa08a93@linux-foundation.org> Reply-To: linux-kernel@vger.kernel.org Return-path: Received: from mail.kernel.org ([198.145.29.99]:60600 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726369AbgBDBef (ORCPT ); Mon, 3 Feb 2020 20:34:35 -0500 In-Reply-To: <20200203173311.6269a8be06a05e5a4aa08a93@linux-foundation.org> Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.org To: 1vier1@web.de, akpm@linux-foundation.org, dave@stgolabs.net, linux-mm@kvack.org, longman@redhat.com, manfred@colorfullife.com, mm-commits@vger.kernel.org, peterz@infradead.org, torvalds@linux-foundation.org, will.deacon@arm.com From: Davidlohr Bueso Subject: ipc/mqueue.c: remove duplicated code pipelined_send() and pipelined_receive() are identical, so merge them. [manfred@colorfullife.com: add changelog] Link: http://lkml.kernel.org/r/20191020123305.14715-3-manfred@colorfullife.com Signed-off-by: Davidlohr Bueso Signed-off-by: Manfred Spraul Cc: <1vier1@web.de> Cc: Peter Zijlstra Cc: Waiman Long Cc: Will Deacon Signed-off-by: Andrew Morton --- ipc/mqueue.c | 31 ++++++++++++++++++------------- 1 file changed, 18 insertions(+), 13 deletions(-) --- a/ipc/mqueue.c~ipc-mqueuec-remove-duplicated-code +++ a/ipc/mqueue.c @@ -918,17 +918,12 @@ out_name: * The same algorithm is used for senders. */ -/* pipelined_send() - send a message directly to the task waiting in - * sys_mq_timedreceive() (without inserting message into a queue). - */ -static inline void pipelined_send(struct wake_q_head *wake_q, +static inline void __pipelined_op(struct wake_q_head *wake_q, struct mqueue_inode_info *info, - struct msg_msg *message, - struct ext_wait_queue *receiver) + struct ext_wait_queue *this) { - receiver->msg = message; - list_del(&receiver->list); - wake_q_add(wake_q, receiver->task); + list_del(&this->list); + wake_q_add(wake_q, this->task); /* * Rely on the implicit cmpxchg barrier from wake_q_add such * that we can ensure that updating receiver->state is the last @@ -937,7 +932,19 @@ static inline void pipelined_send(struct * yet, at that point we can later have a use-after-free * condition and bogus wakeup. */ - receiver->state = STATE_READY; + this->state = STATE_READY; +} + +/* pipelined_send() - send a message directly to the task waiting in + * sys_mq_timedreceive() (without inserting message into a queue). + */ +static inline void pipelined_send(struct wake_q_head *wake_q, + struct mqueue_inode_info *info, + struct msg_msg *message, + struct ext_wait_queue *receiver) +{ + receiver->msg = message; + __pipelined_op(wake_q, info, receiver); } /* pipelined_receive() - if there is task waiting in sys_mq_timedsend() @@ -955,9 +962,7 @@ static inline void pipelined_receive(str if (msg_insert(sender->msg, info)) return; - list_del(&sender->list); - wake_q_add(wake_q, sender->task); - sender->state = STATE_READY; + __pipelined_op(wake_q, info, sender); } static int do_mq_timedsend(mqd_t mqdes, const char __user *u_msg_ptr, _