Commit 7625eccd authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Thomas Gleixner
Browse files

mm: 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.

Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210803141621.780504-21-bigeasy@linutronix.de
parent 252034e0

mm/swap_slots.c

+2 −2
Original line number Diff line number Diff line
@@ -70,9 +70,9 @@ void disable_swap_slots_cache_lock(void) 
	swap_slot_cache_enabled = false;

	if (swap_slot_cache_initialized) {

		/* serialize with cpu hotplug operations */

		get_online_cpus();

		cpus_read_lock();

		__drain_swap_slots_cache(SLOTS_CACHE|SLOTS_CACHE_RET);

		put_online_cpus();

		cpus_read_unlock();

	}

}

mm/vmstat.c

+6 −6
Original line number Diff line number Diff line
@@ -129,9 +129,9 @@ static void sum_vm_events(unsigned long *ret) 
*/

void all_vm_events(unsigned long *ret)

{

	get_online_cpus();

	cpus_read_lock();

	sum_vm_events(ret);

	put_online_cpus();

	cpus_read_unlock();

}

EXPORT_SYMBOL_GPL(all_vm_events);
@@ -1948,7 +1948,7 @@ static void vmstat_shepherd(struct work_struct *w) 
{

	int cpu;



	get_online_cpus();

	cpus_read_lock();

	/* Check processors whose vmstat worker threads have been disabled */

	for_each_online_cpu(cpu) {

		struct delayed_work *dw = &per_cpu(vmstat_work, cpu);
@@ -1958,7 +1958,7 @@ static void vmstat_shepherd(struct work_struct *w) 


		cond_resched();

	}

	put_online_cpus();

	cpus_read_unlock();



	schedule_delayed_work(&shepherd,

		round_jiffies_relative(sysctl_stat_interval));
@@ -2037,9 +2037,9 @@ void __init init_mm_internals(void) 
	if (ret < 0)

		pr_err("vmstat: failed to register 'online' hotplug state\n");



	get_online_cpus();

	cpus_read_lock();

	init_cpu_node_state();

	put_online_cpus();

	cpus_read_unlock();



	start_shepherd_timer();

#endif