Add explicit workqueue_struct->singlethread flag. This lessens .text a little,
but most importantly this allows us to manipulate wq->list without changine the
meaning of is_single_threaded().
Signed-off-by: Oleg Nesterov <[email protected]>
--- 6.20-rc6-mm3/kernel/workqueue.c~5_is_ss 2007-02-07 00:44:52.000000000 +0300
+++ 6.20-rc6-mm3/kernel/workqueue.c 2007-02-07 02:02:06.000000000 +0300
@@ -58,8 +58,9 @@ struct cpu_workqueue_struct {
*/
struct workqueue_struct {
struct cpu_workqueue_struct *cpu_wq;
+ struct list_head list;
const char *name;
- struct list_head list; /* Empty if single thread */
+ int singlethread;
int freezeable; /* Freeze threads during suspend */
};
@@ -76,7 +77,7 @@ static cpumask_t cpu_populated_map __rea
/* If it's single threaded, it isn't in the list of workqueues. */
static inline int is_single_threaded(struct workqueue_struct *wq)
{
- return list_empty(&wq->list);
+ return wq->singlethread;
}
static const cpumask_t *wq_cpu_map(struct workqueue_struct *wq)
@@ -691,10 +692,11 @@ struct workqueue_struct *__create_workqu
}
wq->name = name;
+ wq->singlethread = singlethread;
wq->freezeable = freezeable;
+ INIT_LIST_HEAD(&wq->list);
if (singlethread) {
- INIT_LIST_HEAD(&wq->list);
cwq = init_cpu_workqueue(wq, singlethread_cpu);
err = create_workqueue_thread(cwq, singlethread_cpu);
} else {
-
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