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: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210803141621.780504-21-bigeasy@linutronix.de

diff --git a/mm/swap_slots.c b/mm/swap_slots.c
index a66f3e0..16f706c 100644 (file)
--- a/mm/swap_slots.c
+++ b/mm/swap_slots.c
@@ -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();
        }
 }
 

diff --git a/mm/vmstat.c b/mm/vmstat.c
index b0534e0..a7ed56a 100644 (file)
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -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