The patch titled
workqueues: kill cpu_singlethread_map, use get_cpu_mask() instead
has been added to the -mm tree. Its filename is
workqueues-kill-cpu_singlethread_map-use-get_cpu_mask-instead.patch
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------------------------------------------------------
Subject: workqueues: kill cpu_singlethread_map, use get_cpu_mask() instead
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Now that we have cpu_bit_bitmap[] we don't need cpu_singlethread_map, we
can use get_cpu_mask(singlethread_cpu) directly.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/workqueue.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff -puN kernel/workqueue.c~workqueues-kill-cpu_singlethread_map-use-get_cpu_mask-instead kernel/workqueue.c
--- a/kernel/workqueue.c~workqueues-kill-cpu_singlethread_map-use-get_cpu_mask-instead
+++ a/kernel/workqueue.c
@@ -73,7 +73,6 @@ static DEFINE_SPINLOCK(workqueue_lock);
static LIST_HEAD(workqueues);
static int singlethread_cpu __read_mostly;
-static cpumask_t cpu_singlethread_map __read_mostly;
/*
* _cpu_down() first removes CPU from cpu_online_map, then CPU_DEAD
* flushes cwq->worklist. This means that flush_workqueue/wait_on_work
@@ -92,7 +91,7 @@ static inline int is_single_threaded(str
static const cpumask_t *wq_cpu_map(struct workqueue_struct *wq)
{
return is_single_threaded(wq)
- ? &cpu_singlethread_map : &cpu_populated_map;
+ ? get_cpu_mask(singlethread_cpu) : &cpu_populated_map;
}
static
@@ -1019,7 +1018,6 @@ void __init init_workqueues(void)
{
cpu_populated_map = cpu_online_map;
singlethread_cpu = first_cpu(cpu_possible_map);
- cpu_singlethread_map = cpumask_of_cpu(singlethread_cpu);
hotcpu_notifier(workqueue_cpu_callback, 0);
keventd_wq = create_workqueue("events");
BUG_ON(!keventd_wq);
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
origin.patch
forkc-cleanup-for-copy_sighand.patch
workqueues-kill-cpu_singlethread_map-use-get_cpu_mask-instead.patch
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