linux-kernel - [PATCH 10/38] perf/x86/intel: Replace deprecated CPU-hotplug functions.

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Date:   Tue,  3 Aug 2021 16:15:53 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     tglx@...utronix.de, Peter Zijlstra <peterz@...radead.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Borislav Petkov <bp@...en8.de>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH 10/38] perf/x86/intel: 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: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Borislav Petkov <bp@...en8.de>
Cc: x86@...nel.org
Cc: "H. Peter Anvin" <hpa@...or.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
---
 arch/x86/events/intel/core.c | 8 ++++----
 arch/x86/events/intel/pt.c   | 4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index fca7a6e2242fe..a7b04c8ae4f69 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -5026,9 +5026,9 @@ static ssize_t freeze_on_smi_store(struct device *cdev,
 
 	x86_pmu.attr_freeze_on_smi = val;
 
-	get_online_cpus();
+	cpus_read_lock();
 	on_each_cpu(flip_smm_bit, &val, 1);
-	put_online_cpus();
+	cpus_read_unlock();
 done:
 	mutex_unlock(&freeze_on_smi_mutex);
 
@@ -5071,9 +5071,9 @@ static ssize_t set_sysctl_tfa(struct device *cdev,
 
 	allow_tsx_force_abort = val;
 
-	get_online_cpus();
+	cpus_read_lock();
 	on_each_cpu(update_tfa_sched, NULL, 1);
-	put_online_cpus();
+	cpus_read_unlock();
 
 	return count;
 }
diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c
index 915847655c065..0369a238cdfb1 100644
--- a/arch/x86/events/intel/pt.c
+++ b/arch/x86/events/intel/pt.c
@@ -1708,7 +1708,7 @@ static __init int pt_init(void)
 	if (!boot_cpu_has(X86_FEATURE_INTEL_PT))
 		return -ENODEV;
 
-	get_online_cpus();
+	cpus_read_lock();
 	for_each_online_cpu(cpu) {
 		u64 ctl;
 
@@ -1716,7 +1716,7 @@ static __init int pt_init(void)
 		if (!ret && (ctl & RTIT_CTL_TRACEEN))
 			prior_warn++;
 	}
-	put_online_cpus();
+	cpus_read_unlock();
 
 	if (prior_warn) {
 		x86_add_exclusive(x86_lbr_exclusive_pt);
-- 
2.32.0