From 95847e1bd34c0de86039408b24a05f07e788061d Mon Sep 17 00:00:00 2001 From: Lai Jiangshan Date: Sat, 26 Jul 2014 12:04:00 +0800 Subject: [PATCH] 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 Signed-off-by: Tejun Heo --- include/linux/kthread.h | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) diff --git a/include/linux/kthread.h b/include/linux/kthread.h index 7dcef3317689..13d55206ccf6 100644 --- a/include/linux/kthread.h +++ b/include/linux/kthread.h @@ -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);