Nicholas Piggin <npig...@gmail.com> writes:
> diff --git a/arch/powerpc/include/asm/thread_info.h
> b/arch/powerpc/include/asm/thread_info.h
> index a941cc6fc3e9..5995e4b2996d 100644
> --- a/arch/powerpc/include/asm/thread_info.h
> +++ b/arch/powerpc/include/asm/thread_info.h
> @@ -62,6 +63,24 @@ struct thread_info {
>
> #define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT)
>
> +/*
> + * Emergency stacks are used for a range of things, from asynchronous
> + * NMIs (system reset, machine check) to synchronous, process context.
> + * Set HARDIRQ_OFFSET because we don't know exactly what context we
> + * come from or if it had a valid stack, which is about the best we
> + * can do.
> + * TODO: what to do with accounting?
> + */
> +#define emstack_init_thread_info(ti, c) \
> +do { \
> + (ti)->task = NULL; \
> + (ti)->cpu = (c); \
> + (ti)->preempt_count = HARDIRQ_OFFSET; \
> + (ti)->local_flags = 0; \
> + (ti)->flags = 0; \
> + klp_init_thread_info(ti); \
> +} while (0)
Why don't we just bzero() the whole thing? Like we do for the other
stacks?
cheers
