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.
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