x86/microcode: 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/20210803141621.780504-9-bigeasy@linutronix.de

diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index 6a6318e..efb69be 100644 (file)
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -55,7 +55,7 @@ LIST_HEAD(microcode_cache);
  * All non cpu-hotplug-callback call sites use:
  *
  * - microcode_mutex to synchronize with each other;
- * - get/put_online_cpus() to synchronize with
+ * - cpus_read_lock/unlock() to synchronize with
  *   the cpu-hotplug-callback call sites.
  *
  * We guarantee that only a single cpu is being
@@ -431,7 +431,7 @@ static ssize_t microcode_write(struct file *file, const char __user *buf,
                return ret;
        }
 
-       get_online_cpus();
+       cpus_read_lock();
        mutex_lock(&microcode_mutex);
 
        if (do_microcode_update(buf, len) == 0)
@@ -441,7 +441,7 @@ static ssize_t microcode_write(struct file *file, const char __user *buf,
                perf_check_microcode();
 
        mutex_unlock(&microcode_mutex);
-       put_online_cpus();
+       cpus_read_unlock();
 
        return ret;
 }
@@ -629,7 +629,7 @@ static ssize_t reload_store(struct device *dev,
        if (val != 1)
                return size;
 
-       get_online_cpus();
+       cpus_read_lock();
 
        ret = check_online_cpus();
        if (ret)
@@ -644,7 +644,7 @@ static ssize_t reload_store(struct device *dev,
        mutex_unlock(&microcode_mutex);
 
 put:
-       put_online_cpus();
+       cpus_read_unlock();
 
        if (ret == 0)
                ret = size;
@@ -853,14 +853,14 @@ static int __init microcode_init(void)
        if (IS_ERR(microcode_pdev))
                return PTR_ERR(microcode_pdev);
 
-       get_online_cpus();
+       cpus_read_lock();
        mutex_lock(&microcode_mutex);
 
        error = subsys_interface_register(&mc_cpu_interface);
        if (!error)
                perf_check_microcode();
        mutex_unlock(&microcode_mutex);
-       put_online_cpus();
+       cpus_read_unlock();
 
        if (error)
                goto out_pdev;
@@ -892,13 +892,13 @@ static int __init microcode_init(void)
                           &cpu_root_microcode_group);
 
  out_driver:
-       get_online_cpus();
+       cpus_read_lock();
        mutex_lock(&microcode_mutex);
 
        subsys_interface_unregister(&mc_cpu_interface);
 
        mutex_unlock(&microcode_mutex);
-       put_online_cpus();
+       cpus_read_unlock();
 
  out_pdev:
        platform_device_unregister(microcode_pdev);