From 3471095d73919b45faa286002e3013aee53b7517 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 3 Aug 2021 16:15:50 +0200
Subject: [PATCH] x86/mtrr: Replace deprecated CPU-hotplug functions.

References: bsc#1189998 (PREEMPT_RT prerequisite backports)
Patch-mainline: v5.15-rc1
Git-commit: 1a351eefd4acc97145903b1c07e4d8b626854b82

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/20210803141621.780504-8-bigeasy@linutronix.de
Signed-off-by: Mel Gorman <mgorman@suse.de>
---
 arch/x86/kernel/cpu/mtrr/mtrr.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/cpu/mtrr/mtrr.c b/arch/x86/kernel/cpu/mtrr/mtrr.c
index a76694bffe86..2746cac9d8a9 100644
--- a/arch/x86/kernel/cpu/mtrr/mtrr.c
+++ b/arch/x86/kernel/cpu/mtrr/mtrr.c
@@ -336,7 +336,7 @@ int mtrr_add_page(unsigned long base, unsigned long size,
 	replace = -1;
 
 	/* No CPU hotplug when we change MTRR entries */
-	get_online_cpus();
+	cpus_read_lock();
 
 	/* Search for existing MTRR  */
 	mutex_lock(&mtrr_mutex);
@@ -398,7 +398,7 @@ int mtrr_add_page(unsigned long base, unsigned long size,
 	error = i;
  out:
 	mutex_unlock(&mtrr_mutex);
-	put_online_cpus();
+	cpus_read_unlock();
 	return error;
 }
 
@@ -485,7 +485,7 @@ int mtrr_del_page(int reg, unsigned long base, unsigned long size)
 
 	max = num_var_ranges;
 	/* No CPU hotplug when we change MTRR entries */
-	get_online_cpus();
+	cpus_read_lock();
 	mutex_lock(&mtrr_mutex);
 	if (reg < 0) {
 		/*  Search for existing MTRR  */
@@ -520,7 +520,7 @@ int mtrr_del_page(int reg, unsigned long base, unsigned long size)
 	error = reg;
  out:
 	mutex_unlock(&mtrr_mutex);
-	put_online_cpus();
+	cpus_read_unlock();
 	return error;
 }