On 7/27/20 8:33 PM, Nicholas Piggin wrote:
> Many of these are no-ops on many architectures, so extend mmu_context.h
> to cover MMU and NOMMU, and split the NOMMU bits out to nommu_context.h
>
> -static inline void switch_mm(struct mm_struct *prev,
> - struct mm_struct *next,
> - struct task_struct *tsk)
> +/**
> + * activate_mm - called after exec switches the current task to a new mm, to switch to it
> + * @prev_mm: previous mm of this task
> + * @next_mm: new mm
> + */
> +#ifndef activate_mm
> +static inline void activate_mm(struct mm_struct *prev_mm,
> + struct mm_struct *next_mm)
> {
> + switch_mm(prev_mm, next_mm, current);
> }
> +#endif
Is activate_mm() really needed now. It seems most arches have
activate_mm(p, n) -> switch_mm(p, n, NULL)
And if we are passing current, that can be pushed inside switch_mm()
>
> -static inline void activate_mm(struct mm_struct *prev_mm,
> - struct mm_struct *next_mm)
