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| author | Davidlohr Bueso <dave@stgolabs.net> | 2020-02-03 17:34:32 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-02-04 03:05:23 +0000 |
| commit | ed29f171518cbe11c81e8c20d393bb094a9e2ce7 (patch) | |
| tree | 0ffa7e00779ed8d3cdf00fb40200f8ea7d758eea /ipc | |
| parent | 39323c64b8a95d10ddc66dc815dd14efdddf6777 (diff) | |
| download | lwn-ed29f171518cbe11c81e8c20d393bb094a9e2ce7.tar.gz lwn-ed29f171518cbe11c81e8c20d393bb094a9e2ce7.zip | |
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 <dave@stgolabs.net>
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: <1vier1@web.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc')
| -rw-r--r-- | ipc/mqueue.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 3d920ff15c80..270456530f6a 100644 --- a/ipc/mqueue.c +++ b/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 wake_q_head *wake_q, * 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(struct wake_q_head *wake_q, 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, |