[patch V3 08/32] x86/mtrr: Remove get_online_cpus() from mtrr_save_state()

[Thomas Gleixner]

From: Sebastian Andrzej Siewior <bige...@linutronix.de>

mtrr_save_state() is invoked from native_cpu_up() which is in the context
of a CPU hotplug operation and therefor calling get_online_cpus() is
pointless.

While this works in the current get_online_cpus() implementation it
prevents from converting the hotplug locking to percpu rwsems.

Remove it.

Signed-off-by: Sebastian Andrzej Siewior <bige...@linutronix.de>
Signed-off-by: Thomas Gleixner <t...@linutronix.de>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Steven Rostedt <rost...@goodmis.org>

---
 arch/x86/kernel/cpu/mtrr/main.c |    2 --
 1 file changed, 2 deletions(-)

--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -807,10 +807,8 @@ void mtrr_save_state(void)
        if (!mtrr_enabled())
                return;
 
-       get_online_cpus();
        first_cpu = cpumask_first(cpu_online_mask);
        smp_call_function_single(first_cpu, mtrr_save_fixed_ranges, NULL, 1);
-       put_online_cpus();
 }
 
 void set_mtrr_aps_delayed_init(void)