Hey Stephen-
Nit/suggestion below:
On Fri, Nov 01, 2013 at 03:08:53PM -0700, Stephen Boyd wrote:
[..]
> diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h
> index a8cae71c..c27ec55 100644
> --- a/arch/arm/include/asm/smp.h
> +++ b/arch/arm/include/asm/smp.h
> @@ -112,6 +112,15 @@ struct smp_operations {
> #endif
> };
>
> +struct of_cpu_method {
> + const char *method;
> + struct smp_operations *ops;
> +};
> +
> +#define CPU_METHOD_OF_DECLARE(name, _method, _ops) \
> + static const struct of_cpu_method __cpu_method_of_table_##name \
> + __used __section(__cpu_method_of_table) \
> + = { .method = _method, .ops = _ops }
> /*
> * set platform specific SMP operations
> */
> diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
> index f35906b..71a8592 100644
> --- a/arch/arm/kernel/devtree.c
> +++ b/arch/arm/kernel/devtree.c
> @@ -25,6 +25,7 @@
> #include <asm/smp_plat.h>
> #include <asm/mach/arch.h>
> #include <asm/mach-types.h>
> +#include <asm/smp.h>
>
> void __init early_init_dt_add_memory_arch(u64 base, u64 size)
> {
> @@ -63,6 +64,36 @@ void __init arm_dt_memblock_reserve(void)
> }
> }
>
> +#ifdef CONFIG_SMP
> +extern struct of_cpu_method __cpu_method_of_table[];
> +
> +static const struct of_cpu_method __cpu_method_of_table_sentinel
> + __used __section(__cpu_method_of_table_end);
Having a sentinel allocated into the linked image makes a lot of sense
in other cases (IRQCHIP/CLOCKSOURCE_OF_DECLARE, etc), where it's used to
terminate an of_device_id table (as is expected by of_match_table and
friends).
In this case, however, you aren't building a match table, so having a
sentinel allocated isn't necessary. I'd suggest bookending the table
with a VMLINUX_SYMBOL(__cpu_method_of_table_end) instead.
A whole 2 pointers worth of savings!
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