mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

workqueue: Replace deprecated CPU-hotplug functions. 

The functions get_online_cpus() and put_online_cpus() have been
deprecated during the CPU hotplug rework. They map directly to
cpus_read_lock() and cpus_read_unlock().

Replace deprecated CPU-hotplug functions with the official version.
The behavior remains unchanged.

Cc: Tejun Heo <tj@kernel.org>
Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Sebastian Andrzej Siewior 2021-08-03 16:16:20 +02:00 committed by Tejun Heo
parent e441b56fe4
commit ffd8bea81f
1 changed files with 11 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
kernel/workqueue.c
View File

@ -3292,7 +3292,7 @@ int schedule_on_each_cpu(work_func_t func)
if (!works)
return -ENOMEM;
get_online_cpus();
cpus_read_lock();
for_each_online_cpu(cpu) {
struct work_struct *work = per_cpu_ptr(works, cpu);
@ -3304,7 +3304,7 @@ int schedule_on_each_cpu(work_func_t func)
for_each_online_cpu(cpu)
flush_work(per_cpu_ptr(works, cpu));
put_online_cpus();
cpus_read_unlock();
free_percpu(works);
return 0;
}
@ -4015,14 +4015,14 @@ static void apply_wqattrs_commit(struct apply_wqattrs_ctx *ctx)
static void apply_wqattrs_lock(void)
{
/* CPUs should stay stable across pwq creations and installations */
get_online_cpus();
cpus_read_lock();
mutex_lock(&wq_pool_mutex);
}
static void apply_wqattrs_unlock(void)
{
mutex_unlock(&wq_pool_mutex);
put_online_cpus();
cpus_read_unlock();
}
static int apply_workqueue_attrs_locked(struct workqueue_struct *wq,
@ -4067,7 +4067,7 @@ static int apply_workqueue_attrs_locked(struct workqueue_struct *wq,
*
* Performs GFP_KERNEL allocations.
*
* Assumes caller has CPU hotplug read exclusion, i.e. get_online_cpus().
* Assumes caller has CPU hotplug read exclusion, i.e. cpus_read_lock().
*
* Return: 0 on success and -errno on failure.
*/
@ -4195,7 +4195,7 @@ static int alloc_and_link_pwqs(struct workqueue_struct *wq)
return 0;
}
get_online_cpus();
cpus_read_lock();
if (wq->flags & __WQ_ORDERED) {
ret = apply_workqueue_attrs(wq, ordered_wq_attrs[highpri]);
/* there should only be single pwq for ordering guarantee */
@ -4205,7 +4205,7 @@ static int alloc_and_link_pwqs(struct workqueue_struct *wq)
} else {
ret = apply_workqueue_attrs(wq, unbound_std_wq_attrs[highpri]);
}
put_online_cpus();
cpus_read_unlock();
return ret;
}
@ -5167,10 +5167,10 @@ long work_on_cpu_safe(int cpu, long (*fn)(void *), void *arg)
{
long ret = -ENODEV;
get_online_cpus();
cpus_read_lock();
if (cpu_online(cpu))
ret = work_on_cpu(cpu, fn, arg);
put_online_cpus();
cpus_read_unlock();
return ret;
}
EXPORT_SYMBOL_GPL(work_on_cpu_safe);
@ -5442,7 +5442,7 @@ static ssize_t wq_pool_ids_show(struct device *dev,
const char *delim = "";
int node, written = 0;
get_online_cpus();
cpus_read_lock();
rcu_read_lock();
for_each_node(node) {
written += scnprintf(buf + written, PAGE_SIZE - written,
@ -5452,7 +5452,7 @@ static ssize_t wq_pool_ids_show(struct device *dev,
}
written += scnprintf(buf + written, PAGE_SIZE - written, "\n");
rcu_read_unlock();
put_online_cpus();
cpus_read_unlock();
return written;
}