perf/hw_breakpoint: 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>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210803141621.780504-12-bigeasy@linutronix.de

diff --git a/kernel/events/hw_breakpoint.c b/kernel/events/hw_breakpoint.c
index 8359734..f32320a 100644 (file)
--- a/kernel/events/hw_breakpoint.c
+++ b/kernel/events/hw_breakpoint.c
@@ -568,7 +568,7 @@ register_wide_hw_breakpoint(struct perf_event_attr *attr,
        if (!cpu_events)
                return (void __percpu __force *)ERR_PTR(-ENOMEM);
 
-       get_online_cpus();
+       cpus_read_lock();
        for_each_online_cpu(cpu) {
                bp = perf_event_create_kernel_counter(attr, cpu, NULL,
                                                      triggered, context);
@@ -579,7 +579,7 @@ register_wide_hw_breakpoint(struct perf_event_attr *attr,
 
                per_cpu(*cpu_events, cpu) = bp;
        }
-       put_online_cpus();
+       cpus_read_unlock();
 
        if (likely(!err))
                return cpu_events;