Re: [PATCH] kgdb: more barrier in blank weak function

[Ingo Molnar]

* Yinghai Lu <yinghai@xxxxxxxxxx> wrote:

> Impact: fix panic possible panic etc
> 
> some compiler seems to inline the weak global function if no line in it

>  kgdb_post_primary_code(struct pt_regs *regs, int e_vector, int err_code)
>  {
> -	return;
> +	barrier();
>  }

>  void __weak kgdb_disable_hw_debug(struct pt_regs *regs)
>  {
> +	barrier();
>  }

seems like the barrier() is not enough - the only safe sequence seems to 
be to turn it into a function that returns an integer.

	Ingo
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