[PATCHv3 3/5] arm64: read enable-method for CPU0
Nicolas Pitre
nicolas.pitre at linaro.org
Wed Aug 14 13:51:49 EDT 2013
On Wed, 14 Aug 2013, Mark Rutland wrote:
> With the advent of CPU_HOTPLUG, the enable-method property for CPU0
> may tells us something useful (i.e. how to hotplug it back on), so
> we must read it along with all the enable-method for all the other CPUs.
>
> This patch ensures that CPU0's enable-method property is read.
>
> Signed-off-by: Mark Rutland <mark.rutland at arm.com>
Acked-by: Nicolas Pitre <nico at linaro.org>
> ---
> arch/arm64/kernel/smp.c | 15 +++++++--------
> 1 file changed, 7 insertions(+), 8 deletions(-)
>
> diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
> index 72c2823..f6ce2ae 100644
> --- a/arch/arm64/kernel/smp.c
> +++ b/arch/arm64/kernel/smp.c
> @@ -254,6 +254,8 @@ void __init smp_init_cpus(void)
> }
> }
>
> + enable_method = of_get_property(dn, "enable-method", NULL);
> +
> /*
> * The numbering scheme requires that the boot CPU
> * must be assigned logical id 0. Record it so that
> @@ -269,11 +271,12 @@ void __init smp_init_cpus(void)
>
> bootcpu_valid = true;
>
> + if (enable_method)
> + smp_ops[0] = smp_get_ops(enable_method);
> +
> /*
> - * cpu_logical_map has already been
> - * initialized and the boot cpu doesn't need
> - * the enable-method so continue without
> - * incrementing cpu.
> + * cpu_logical_map has already been initialized so
> + * continue without incrementing cpu.
> */
> continue;
> }
> @@ -281,10 +284,6 @@ void __init smp_init_cpus(void)
> if (cpu >= NR_CPUS)
> goto next;
>
> - /*
> - * We currently support only the "spin-table" enable-method.
> - */
> - enable_method = of_get_property(dn, "enable-method", NULL);
> if (!enable_method) {
> pr_err("%s: missing enable-method property\n",
> dn->full_name);
> --
> 1.8.1.1
>
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