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Commit 424ef016 authored by Naveen N. Rao's avatar Naveen N. Rao Committed by Michael Ellerman
Browse files

powerpc64/ftrace: Disable ftrace during hotplug 



Disable ftrace when a cpu is about to go offline. When the cpu is woken
up, ftrace will get enabled in start_secondary().

Signed-off-by: default avatarNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent d1039786

arch/powerpc/kernel/smp.c

+8 −0
Original line number Diff line number Diff line
@@ -1166,6 +1166,8 @@ int __cpu_disable(void) 
	if (!smp_ops->cpu_disable)

		return -ENOSYS;



	this_cpu_disable_ftrace();



	err = smp_ops->cpu_disable();

	if (err)

		return err;
@@ -1184,6 +1186,12 @@ void __cpu_die(unsigned int cpu) 


void cpu_die(void)

{

	/*

	 * Disable on the down path. This will be re-enabled by

	 * start_secondary() via start_secondary_resume() below

	 */

	this_cpu_disable_ftrace();



	if (ppc_md.cpu_die)

		ppc_md.cpu_die();