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workqueue: kill NOAUTOREL works

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We don't have any users, and it is not so trivial to use NOAUTOREL works
correctly.  It is better to simplify API.

Delete NOAUTOREL support and rename work_release to work_clear_pending to
avoid a confusion.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2007-05-09 02:34:19 -07:00 committed by Linus Torvalds
parent c214b2cc5f
commit 23b2e5991a
2 changed files with 11 additions and 58 deletions
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64
include/linux/workqueue.h
View file

@ -24,15 +24,13 @@ typedef void (*work_func_t)(struct work_struct *work);
struct work_struct {
atomic_long_t data;
#define WORK_STRUCT_PENDING 0 /* T if work item pending execution */
#define WORK_STRUCT_NOAUTOREL 1 /* F if work item automatically released on exec */
#define WORK_STRUCT_FLAG_MASK (3UL)
#define WORK_STRUCT_WQ_DATA_MASK (~WORK_STRUCT_FLAG_MASK)
struct list_head entry;
work_func_t func;
};
#define WORK_DATA_INIT(autorelease) \
ATOMIC_LONG_INIT((autorelease) << WORK_STRUCT_NOAUTOREL)
#define WORK_DATA_INIT() ATOMIC_LONG_INIT(0)
struct delayed_work {
struct work_struct work;
@ -44,14 +42,8 @@ struct execute_work {
};
#define __WORK_INITIALIZER(n, f) { \
.data = WORK_DATA_INIT(0), \
.entry = { &(n).entry, &(n).entry }, \
.func = (f), \
}
#define __WORK_INITIALIZER_NAR(n, f) { \
.data = WORK_DATA_INIT(1), \
.entry = { &(n).entry, &(n).entry }, \
.data = WORK_DATA_INIT(), \
.entry = { &(n).entry, &(n).entry }, \
.func = (f), \
}
@ -60,23 +52,12 @@ struct execute_work {
.timer = TIMER_INITIALIZER(NULL, 0, 0), \
}
#define __DELAYED_WORK_INITIALIZER_NAR(n, f) { \
.work = __WORK_INITIALIZER_NAR((n).work, (f)), \
.timer = TIMER_INITIALIZER(NULL, 0, 0), \
}
#define DECLARE_WORK(n, f) \
struct work_struct n = __WORK_INITIALIZER(n, f)
#define DECLARE_WORK_NAR(n, f) \
struct work_struct n = __WORK_INITIALIZER_NAR(n, f)
#define DECLARE_DELAYED_WORK(n, f) \
struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f)
#define DECLARE_DELAYED_WORK_NAR(n, f) \
struct dwork_struct n = __DELAYED_WORK_INITIALIZER_NAR(n, f)
/*
* initialize a work item's function pointer
*/
@ -95,16 +76,9 @@ struct execute_work {
* assignment of the work data initializer allows the compiler
* to generate better code.
*/
#define INIT_WORK(_work, _func) \
do { \
(_work)->data = (atomic_long_t) WORK_DATA_INIT(0); \
INIT_LIST_HEAD(&(_work)->entry); \
PREPARE_WORK((_work), (_func)); \
} while (0)
#define INIT_WORK_NAR(_work, _func) \
#define INIT_WORK(_work, _func) \
do { \
(_work)->data = (atomic_long_t) WORK_DATA_INIT(1); \
(_work)->data = (atomic_long_t) WORK_DATA_INIT(); \
INIT_LIST_HEAD(&(_work)->entry); \
PREPARE_WORK((_work), (_func)); \
} while (0)
@ -115,12 +89,6 @@ struct execute_work {
init_timer(&(_work)->timer); \
} while (0)
#define INIT_DELAYED_WORK_NAR(_work, _func) \
do { \
INIT_WORK_NAR(&(_work)->work, (_func)); \
init_timer(&(_work)->timer); \
} while (0)
#define INIT_DELAYED_WORK_DEFERRABLE(_work, _func) \
do { \
INIT_WORK(&(_work)->work, (_func)); \
@ -143,24 +111,10 @@ struct execute_work {
work_pending(&(w)->work)
/**
* work_release - Release a work item under execution
* @work: The work item to release
*
* This is used to release a work item that has been initialised with automatic
* release mode disabled (WORK_STRUCT_NOAUTOREL is set). This gives the work
* function the opportunity to grab auxiliary data from the container of the
* work_struct before clearing the pending bit as the work_struct may be
* subject to deallocation the moment the pending bit is cleared.
*
* In such a case, this should be called in the work function after it has
* fetched any data it may require from the containter of the work_struct.
* After this function has been called, the work_struct may be scheduled for
* further execution or it may be deallocated unless other precautions are
* taken.
*
* This should also be used to release a delayed work item.
* work_clear_pending - for internal use only, mark a work item as not pending
* @work: The work item in question
*/
#define work_release(work) \
#define work_clear_pending(work) \
clear_bit(WORK_STRUCT_PENDING, work_data_bits(work))
@ -205,7 +159,7 @@ static inline int cancel_delayed_work(struct delayed_work *work)
ret = del_timer(&work->timer);
if (ret)
work_release(&work->work);
work_clear_pending(&work->work);
return ret;
}

5
kernel/workqueue.c
View file

@ -246,8 +246,7 @@ static void run_workqueue(struct cpu_workqueue_struct *cwq)
spin_unlock_irq(&cwq->lock);
BUG_ON(get_wq_data(work) != cwq);
if (!test_bit(WORK_STRUCT_NOAUTOREL, work_data_bits(work)))
work_release(work);
work_clear_pending(work);
f(work);
if (unlikely(in_atomic() || lockdep_depth(current) > 0)) {
@ -453,7 +452,7 @@ void flush_work(struct workqueue_struct *wq, struct work_struct *work)
*/
spin_lock_irq(&cwq->lock);
list_del_init(&work->entry);
work_release(work);
work_clear_pending(work);
spin_unlock_irq(&cwq->lock);
for_each_cpu_mask(cpu, *cpu_map)