[tip: perf/core] perf/hw_breakpoint: Replace deprecated CPU-hotplug functions.

[tip-bot2 for Sebastian Andrzej Siewior]

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     b28a32083bfa485f516c8b08c5d6050ff5aef3fb
Gitweb:        https://git.kernel.org/tip/b28a32083bfa485f516c8b08c5d6050ff5aef3fb
Author:        Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
AuthorDate:    Tue, 03 Aug 2021 16:15:54 +02:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Tue, 10 Aug 2021 15:00:26 +02:00

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@xxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210803141621.780504-12-bigeasy@xxxxxxxxxxxxx

---
 kernel/events/hw_breakpoint.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/events/hw_breakpoint.c b/kernel/events/hw_breakpoint.c
index 8359734..f32320a 100644
--- 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;