Le 11/04/2018 ? 10:41, Laurent Dufour a ?crit?:
> On 11/04/2018 10:33, Michal Hocko wrote:
>> 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?
> Indeed the compiler doesn't complaint but in theory it should since these
> labels are not used depending on CONFIG_ARCH_HAS_PTE_SPECIAL.
Why should it complain ?
Regards
Christophe
>
