Re: [PATCH v6 22/24] mm: Speculative page fault handler return VMA

[Matthew Wilcox]

On Fri, Jan 12, 2018 at 06:26:06PM +0100, Laurent Dufour wrote:
> @@ -1354,7 +1354,10 @@ extern int handle_mm_fault(struct vm_area_struct *vma, unsigned long address,
>  		unsigned int flags);
>  #ifdef CONFIG_SPF
>  extern int handle_speculative_fault(struct mm_struct *mm,
> +				    unsigned long address, unsigned int flags,
> +				    struct vm_area_struct **vma);

I think this shows that we need to create 'struct vm_fault' on the stack
in the arch code and then pass it to handle_speculative_fault(), followed
by handle_mm_fault().  That should be quite a nice cleanup actually.
I know that's only 30+ architectures to change ;-)