9 Jun
2022
9 Jun
'22
5:56 p.m.
On Thu, Jun 09, 2022 at 10:47:35AM -0700, Shakeel Butt wrote:
On Thu, Jun 9, 2022 at 10:27 AM Roman Gushchin roman.gushchin@linux.dev 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)?
Idk, can it realistically return NULL after is_vmalloc_addr() returned true? I would be surprised, but maybe I'm missing something.