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authorDavid Woodhouse <David.Woodhouse@intel.com>2009-01-05 04:50:33 -0500
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-01-05 04:50:33 -0500
commit353816f43d1fb340ff2d9a911dd5d0799c09f6a5 (patch)
tree517290fd884d286fe2971137ac89f89e3567785a /kernel/workqueue.c
parent160bbab3000dafccbe43688e48208cecf4deb879 (diff)
parentfe0bdec68b77020281dc814805edfe594ae89e0f (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: arch/arm/mach-pxa/corgi.c arch/arm/mach-pxa/poodle.c arch/arm/mach-pxa/spitz.c
Diffstat (limited to 'kernel/workqueue.c')
-rw-r--r--kernel/workqueue.c34
1 files changed, 18 insertions, 16 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index d4dc69ddebd7..2f445833ae37 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -73,7 +73,7 @@ static DEFINE_SPINLOCK(workqueue_lock);
73static LIST_HEAD(workqueues); 73static LIST_HEAD(workqueues);
74 74
75static int singlethread_cpu __read_mostly; 75static int singlethread_cpu __read_mostly;
76static cpumask_t cpu_singlethread_map __read_mostly; 76static const struct cpumask *cpu_singlethread_map __read_mostly;
77/* 77/*
78 * _cpu_down() first removes CPU from cpu_online_map, then CPU_DEAD 78 * _cpu_down() first removes CPU from cpu_online_map, then CPU_DEAD
79 * flushes cwq->worklist. This means that flush_workqueue/wait_on_work 79 * flushes cwq->worklist. This means that flush_workqueue/wait_on_work
@@ -81,24 +81,24 @@ static cpumask_t cpu_singlethread_map __read_mostly;
81 * use cpu_possible_map, the cpumask below is more a documentation 81 * use cpu_possible_map, the cpumask below is more a documentation
82 * than optimization. 82 * than optimization.
83 */ 83 */
84static cpumask_t cpu_populated_map __read_mostly; 84static cpumask_var_t cpu_populated_map __read_mostly;
85 85
86/* If it's single threaded, it isn't in the list of workqueues. */ 86/* If it's single threaded, it isn't in the list of workqueues. */
87static inline int is_single_threaded(struct workqueue_struct *wq) 87static inline int is_wq_single_threaded(struct workqueue_struct *wq)
88{ 88{
89 return wq->singlethread; 89 return wq->singlethread;
90} 90}
91 91
92static const cpumask_t *wq_cpu_map(struct workqueue_struct *wq) 92static const struct cpumask *wq_cpu_map(struct workqueue_struct *wq)
93{ 93{
94 return is_single_threaded(wq) 94 return is_wq_single_threaded(wq)
95 ? &cpu_singlethread_map : &cpu_populated_map; 95 ? cpu_singlethread_map : cpu_populated_map;
96} 96}
97 97
98static 98static
99struct cpu_workqueue_struct *wq_per_cpu(struct workqueue_struct *wq, int cpu) 99struct cpu_workqueue_struct *wq_per_cpu(struct workqueue_struct *wq, int cpu)
100{ 100{
101 if (unlikely(is_single_threaded(wq))) 101 if (unlikely(is_wq_single_threaded(wq)))
102 cpu = singlethread_cpu; 102 cpu = singlethread_cpu;
103 return per_cpu_ptr(wq->cpu_wq, cpu); 103 return per_cpu_ptr(wq->cpu_wq, cpu);
104} 104}
@@ -410,7 +410,7 @@ static int flush_cpu_workqueue(struct cpu_workqueue_struct *cwq)
410 */ 410 */
411void flush_workqueue(struct workqueue_struct *wq) 411void flush_workqueue(struct workqueue_struct *wq)
412{ 412{
413 const cpumask_t *cpu_map = wq_cpu_map(wq); 413 const struct cpumask *cpu_map = wq_cpu_map(wq);
414 int cpu; 414 int cpu;
415 415
416 might_sleep(); 416 might_sleep();
@@ -532,7 +532,7 @@ static void wait_on_work(struct work_struct *work)
532{ 532{
533 struct cpu_workqueue_struct *cwq; 533 struct cpu_workqueue_struct *cwq;
534 struct workqueue_struct *wq; 534 struct workqueue_struct *wq;
535 const cpumask_t *cpu_map; 535 const struct cpumask *cpu_map;
536 int cpu; 536 int cpu;
537 537
538 might_sleep(); 538 might_sleep();
@@ -769,7 +769,7 @@ static int create_workqueue_thread(struct cpu_workqueue_struct *cwq, int cpu)
769{ 769{
770 struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 }; 770 struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
771 struct workqueue_struct *wq = cwq->wq; 771 struct workqueue_struct *wq = cwq->wq;
772 const char *fmt = is_single_threaded(wq) ? "%s" : "%s/%d"; 772 const char *fmt = is_wq_single_threaded(wq) ? "%s" : "%s/%d";
773 struct task_struct *p; 773 struct task_struct *p;
774 774
775 p = kthread_create(worker_thread, cwq, fmt, wq->name, cpu); 775 p = kthread_create(worker_thread, cwq, fmt, wq->name, cpu);
@@ -903,7 +903,7 @@ static void cleanup_workqueue_thread(struct cpu_workqueue_struct *cwq)
903 */ 903 */
904void destroy_workqueue(struct workqueue_struct *wq) 904void destroy_workqueue(struct workqueue_struct *wq)
905{ 905{
906 const cpumask_t *cpu_map = wq_cpu_map(wq); 906 const struct cpumask *cpu_map = wq_cpu_map(wq);
907 int cpu; 907 int cpu;
908 908
909 cpu_maps_update_begin(); 909 cpu_maps_update_begin();
@@ -933,7 +933,7 @@ static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
933 933
934 switch (action) { 934 switch (action) {
935 case CPU_UP_PREPARE: 935 case CPU_UP_PREPARE:
936 cpu_set(cpu, cpu_populated_map); 936 cpumask_set_cpu(cpu, cpu_populated_map);
937 } 937 }
938undo: 938undo:
939 list_for_each_entry(wq, &workqueues, list) { 939 list_for_each_entry(wq, &workqueues, list) {
@@ -964,7 +964,7 @@ undo:
964 switch (action) { 964 switch (action) {
965 case CPU_UP_CANCELED: 965 case CPU_UP_CANCELED:
966 case CPU_POST_DEAD: 966 case CPU_POST_DEAD:
967 cpu_clear(cpu, cpu_populated_map); 967 cpumask_clear_cpu(cpu, cpu_populated_map);
968 } 968 }
969 969
970 return ret; 970 return ret;
@@ -1017,9 +1017,11 @@ EXPORT_SYMBOL_GPL(work_on_cpu);
1017 1017
1018void __init init_workqueues(void) 1018void __init init_workqueues(void)
1019{ 1019{
1020 cpu_populated_map = cpu_online_map; 1020 alloc_cpumask_var(&cpu_populated_map, GFP_KERNEL);
1021 singlethread_cpu = first_cpu(cpu_possible_map); 1021
1022 cpu_singlethread_map = cpumask_of_cpu(singlethread_cpu); 1022 cpumask_copy(cpu_populated_map, cpu_online_mask);
1023 singlethread_cpu = cpumask_first(cpu_possible_mask);
1024 cpu_singlethread_map = cpumask_of(singlethread_cpu);
1023 hotcpu_notifier(workqueue_cpu_callback, 0); 1025 hotcpu_notifier(workqueue_cpu_callback, 0);
1024 keventd_wq = create_workqueue("events"); 1026 keventd_wq = create_workqueue("events");
1025 BUG_ON(!keventd_wq); 1027 BUG_ON(!keventd_wq);