Re: [PATCH v5 08/17] unwind_user/deferred: Add unwind cache

[Steven Rostedt]

On Thu, 24 Apr 2025 12:25:37 -0400
Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:

> --- a/include/linux/unwind_deferred.h
> +++ b/include/linux/unwind_deferred.h
> @@ -12,6 +12,11 @@ void unwind_task_free(struct task_struct *task);
>  
>  int unwind_deferred_trace(struct unwind_stacktrace *trace);
>  
> +static __always_inline void unwind_enter_from_user_mode(void)
> +{
> +	current->unwind_info.cache.nr_entries = 0;
> +}
> +

Hmm, the first patches just had unwind_enter_from_user_mode(), but the
later patches (that I'm currently working on) have unwind_exit_to_user_mode().

I think the exit is better than the entry, and I will change this to just
use the exit_to_user_mode and removed the enter_from_user_mode.

-- Steve