On Fri, Oct 2, 2020 at 10:26 AM Roman Gushchin <guro@xxxxxx> wrote: > > To gather all direct accesses to struct page's memcg_data field > in one place, let's introduce 3 new helpers to use in the slab > accounting code: > struct obj_cgroup **page_objcgs(struct page *page); > struct obj_cgroup **page_objcgs_check(struct page *page); > bool set_page_objcgs(struct page *page, struct obj_cgroup **objcgs); > > They are similar to the corresponding API for generic pages, except > that the setter can return false, indicating that the value has been > already set from a different thread. > > Signed-off-by: Roman Gushchin <guro@xxxxxx> > Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
