On Tue, 2013-05-28 at 15:59 +0800, Zhao Chenhui wrote:
> Some features depend on the boot cpu, for instance, hibernate/suspend.
> So disable hotplug for the boot cpu.
Don't we have code to "move" the boot CPU around when that happens ?
Ben.
> Signed-off-by: Zhao Chenhui <chenhui.z...@freescale.com>
> ---
> arch/powerpc/kernel/sysfs.c | 4 +++-
> 1 files changed, 3 insertions(+), 1 deletions(-)
>
> diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
> index e68a845..294b1c4e 100644
> --- a/arch/powerpc/kernel/sysfs.c
> +++ b/arch/powerpc/kernel/sysfs.c
> @@ -655,8 +655,10 @@ static int __init topology_init(void)
> * CPU. For instance, the boot cpu might never be valid
> * for hotplugging.
> */
> - if (ppc_md.cpu_die)
> + if (ppc_md.cpu_die && cpu != boot_cpuid)
> c->hotpluggable = 1;
> + else
> + c->hotpluggable = 0;
>
> if (cpu_online(cpu) || c->hotpluggable) {
> register_cpu(c, cpu);
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