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kthread_work: remove the unused wait_queue_head 

The wait_queue_head_t kthread_work->done is unused since
flush_kthread_work() has been re-implemented.  Let's remove it
including the initialization code.  This makes
DEFINE_KTHREAD_WORK_ONSTACK() unnecessary, removed.

tj: Updated description.  Removed DEFINE_KTHREAD_WORK_ONSTACK().

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Lai Jiangshan 2014-07-26 12:04:00 +08:00 committed by Tejun Heo
parent ed1403ec2b
commit 95847e1bd3
1 changed files with 2 additions and 11 deletions
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13
include/linux/kthread.h
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@ -73,7 +73,6 @@ struct kthread_worker {
struct kthread_work {
struct list_head node;
kthread_work_func_t func;
wait_queue_head_t done;
struct kthread_worker *worker;
};
@ -85,7 +84,6 @@ struct kthread_work {
#define KTHREAD_WORK_INIT(work, fn) { \
.node = LIST_HEAD_INIT((work).node), \
.func = (fn), \
.done = __WAIT_QUEUE_HEAD_INITIALIZER((work).done), \
}
#define DEFINE_KTHREAD_WORKER(worker) \
@ -95,22 +93,16 @@ struct kthread_work {
struct kthread_work work = KTHREAD_WORK_INIT(work, fn)
/*
* kthread_worker.lock and kthread_work.done need their own lockdep class
* keys if they are defined on stack with lockdep enabled. Use the
* following macros when defining them on stack.
* kthread_worker.lock needs its own lockdep class key when defined on
* stack with lockdep enabled. Use the following macros in such cases.
*/
#ifdef CONFIG_LOCKDEP
# define KTHREAD_WORKER_INIT_ONSTACK(worker) \
({ init_kthread_worker(&worker); worker; })
# define DEFINE_KTHREAD_WORKER_ONSTACK(worker) \
struct kthread_worker worker = KTHREAD_WORKER_INIT_ONSTACK(worker)
# define KTHREAD_WORK_INIT_ONSTACK(work, fn) \
({ init_kthread_work((&work), fn); work; })
# define DEFINE_KTHREAD_WORK_ONSTACK(work, fn) \
struct kthread_work work = KTHREAD_WORK_INIT_ONSTACK(work, fn)
#else
# define DEFINE_KTHREAD_WORKER_ONSTACK(worker) DEFINE_KTHREAD_WORKER(worker)
# define DEFINE_KTHREAD_WORK_ONSTACK(work, fn) DEFINE_KTHREAD_WORK(work, fn)
#endif
extern void __init_kthread_worker(struct kthread_worker *worker,
@ -127,7 +119,6 @@ extern void __init_kthread_worker(struct kthread_worker *worker,
memset((work), 0, sizeof(struct kthread_work)); \
INIT_LIST_HEAD(&(work)->node); \
(work)->func = (fn); \
init_waitqueue_head(&(work)->done); \
} while (0)
int kthread_worker_fn(void *worker_ptr);