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workqueue: merge feature parameters into flags 

Currently, __create_workqueue_key() takes @singlethread and
@freezeable paramters and store them separately in workqueue_struct.
Merge them into a single flags parameter and field and use
WQ_FREEZEABLE and WQ_SINGLE_THREAD.

Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo 2010-06-29 10:07:10 +02:00
parent 4690c4ab56
commit 97e37d7b9e
2 changed files with 22 additions and 20 deletions
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25
include/linux/workqueue.h
View File

@ -184,13 +184,17 @@ static inline unsigned int work_static(struct work_struct *work) { return 0; }
#define work_clear_pending(work) \
clear_bit(WORK_STRUCT_PENDING, work_data_bits(work))
enum {
WQ_FREEZEABLE = 1 << 0, /* freeze during suspend */
WQ_SINGLE_THREAD = 1 << 1, /* no per-cpu worker */
};
extern struct workqueue_struct *
__create_workqueue_key(const char *name, int singlethread, int freezeable,
__create_workqueue_key(const char *name, unsigned int flags,
struct lock_class_key *key, const char *lock_name);
#ifdef CONFIG_LOCKDEP
#define __create_workqueue(name, singlethread, freezeable) \
#define __create_workqueue(name, flags) \
({ \
static struct lock_class_key __key; \
const char *__lock_name; \
@ -200,19 +204,20 @@ __create_workqueue_key(const char *name, int singlethread, int freezeable,
else \
__lock_name = #name; \
\
__create_workqueue_key((name), (singlethread), \
(freezeable), &__key, \
__create_workqueue_key((name), (flags), &__key, \
__lock_name); \
})
#else
#define __create_workqueue(name, singlethread, freezeable) \
__create_workqueue_key((name), (singlethread), (freezeable), \
NULL, NULL)
#define __create_workqueue(name, flags) \
__create_workqueue_key((name), (flags), NULL, NULL)
#endif
#define create_workqueue(name) __create_workqueue((name), 0, 0)
#define create_freezeable_workqueue(name) __create_workqueue((name), 1, 1)
#define create_singlethread_workqueue(name) __create_workqueue((name), 1, 0)
#define create_workqueue(name) \
__create_workqueue((name), 0)
#define create_freezeable_workqueue(name) \
__create_workqueue((name), WQ_FREEZEABLE | WQ_SINGLE_THREAD)
#define create_singlethread_workqueue(name) \
__create_workqueue((name), WQ_SINGLE_THREAD)
extern void destroy_workqueue(struct workqueue_struct *wq);

17
kernel/workqueue.c
View File

@ -67,11 +67,10 @@ struct cpu_workqueue_struct {
* per-CPU workqueues:
*/
struct workqueue_struct {
unsigned int flags; /* I: WQ_* flags */
struct cpu_workqueue_struct *cpu_wq; /* I: cwq's */
struct list_head list; /* W: list of all workqueues */
const char *name; /* I: workqueue name */
int singlethread;
int freezeable; /* Freeze threads during suspend */
#ifdef CONFIG_LOCKDEP
struct lockdep_map lockdep_map;
#endif
@ -203,9 +202,9 @@ static const struct cpumask *cpu_singlethread_map __read_mostly;
static cpumask_var_t cpu_populated_map __read_mostly;
/* If it's single threaded, it isn't in the list of workqueues. */
static inline int is_wq_single_threaded(struct workqueue_struct *wq)
static inline bool is_wq_single_threaded(struct workqueue_struct *wq)
{
return wq->singlethread;
return wq->flags & WQ_SINGLE_THREAD;
}
static const struct cpumask *wq_cpu_map(struct workqueue_struct *wq)
@ -463,7 +462,7 @@ static int worker_thread(void *__cwq)
struct cpu_workqueue_struct *cwq = __cwq;
DEFINE_WAIT(wait);
if (cwq->wq->freezeable)
if (cwq->wq->flags & WQ_FREEZEABLE)
set_freezable();
for (;;) {
@ -1013,8 +1012,7 @@ static void start_workqueue_thread(struct cpu_workqueue_struct *cwq, int cpu)
}
struct workqueue_struct *__create_workqueue_key(const char *name,
int singlethread,
int freezeable,
unsigned int flags,
struct lock_class_key *key,
const char *lock_name)
{
@ -1030,13 +1028,12 @@ struct workqueue_struct *__create_workqueue_key(const char *name,
if (!wq->cpu_wq)
goto err;
wq->flags = flags;
wq->name = name;
lockdep_init_map(&wq->lockdep_map, lock_name, key, 0);
wq->singlethread = singlethread;
wq->freezeable = freezeable;
INIT_LIST_HEAD(&wq->list);
if (singlethread) {
if (flags & WQ_SINGLE_THREAD) {
cwq = init_cpu_workqueue(wq, singlethread_cpu);
err = create_workqueue_thread(cwq, singlethread_cpu);
start_workqueue_thread(cwq, -1);