ia64: Replace cpu_down() with smp_shutdown_nonboot_cpus()

Use the new smp_shutdown_nonboot_cpus() instead of using cpu_down()
directly.

Use reboot_cpu instead of hardcoding the boot CPU to 0.

This also prepares to make cpu_up/down() a private interface of the CPU
subsystem.

Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Link: https://lkml.kernel.org/r/20200323135110.30522-4-qais.yousef@arm.com

diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 968b5f33e725e738a72510883bf693bab6c3c617..bf4c0cdb7a25672e1c2d82d19f3c63e642753463 100644 (file)
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -646,14 +646,8 @@ cpu_halt (void)
 
 void machine_shutdown(void)
 {
-#ifdef CONFIG_HOTPLUG_CPU
-       int cpu;
+       smp_shutdown_nonboot_cpus(reboot_cpu);
 
-       for_each_online_cpu(cpu) {
-               if (cpu != smp_processor_id())
-                       cpu_down(cpu);
-       }
-#endif
 #ifdef CONFIG_KEXEC
        kexec_disable_iosapic();
 #endif