On Thu, Jun 9, 2022 at 10:27 AM Roman Gushchin <roman.gushchin@xxxxxxxxx> wrote:
>
[...]
> +struct mem_cgroup *mem_cgroup_from_obj(void *p)
> +{
> + struct folio *folio;
> +
> + if (mem_cgroup_disabled())
> + return NULL;
> +
> + if (unlikely(is_vmalloc_addr(p)))
> + folio = page_folio(vmalloc_to_page(p));
Do we need to check for NULL from vmalloc_to_page(p)?
> + else
> + folio = virt_to_folio(p);
> +
> + return mem_cgroup_from_obj_folio(folio, p);
> +}
