Re: [PATCH v3 2/2] mm: remove odd HAVE_PTE_SPECIAL

[Michal Hocko]

On Wed 11-04-18 10:03:36, Laurent Dufour wrote:
> @@ -881,7 +876,8 @@ struct page *_vm_normal_page(struct vm_area_struct *vma, unsigned long addr,
>  
>  	if (is_zero_pfn(pfn))
>  		return NULL;
> -check_pfn:
> +
> +check_pfn: __maybe_unused
>  	if (unlikely(pfn > highest_memmap_pfn)) {
>  		print_bad_pte(vma, addr, pte, NULL);
>  		return NULL;
> @@ -891,7 +887,7 @@ struct page *_vm_normal_page(struct vm_area_struct *vma, unsigned long addr,
>  	 * NOTE! We still have PageReserved() pages in the page tables.
>  	 * eg. VDSO mappings can cause them to exist.
>  	 */
> -out:
> +out: __maybe_unused
>  	return pfn_to_page(pfn);

Why do we need this ugliness all of the sudden?

-- 
Michal Hocko
SUSE Labs