diff options
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 32 |
1 files changed, 1 insertions, 31 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index f29157288b7d..f0297e7c3d12 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2446,37 +2446,7 @@ struct mem_cgroup *mem_cgroup_from_obj_folio(struct folio *folio, void *p) /* * Returns a pointer to the memory cgroup to which the kernel object is charged. - * - * A passed kernel object can be a slab object, vmalloc object or a generic - * kernel page, so different mechanisms for getting the memory cgroup pointer - * should be used. - * - * In certain cases (e.g. kernel stacks or large kmallocs with SLUB) the caller - * can not know for sure how the kernel object is implemented. - * mem_cgroup_from_obj() can be safely used in such cases. - * - * The caller must ensure the memcg lifetime, e.g. by taking rcu_read_lock(), - * cgroup_mutex, etc. - */ -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)); - else - folio = virt_to_folio(p); - - return mem_cgroup_from_obj_folio(folio, p); -} - -/* - * Returns a pointer to the memory cgroup to which the kernel object is charged. - * Similar to mem_cgroup_from_obj(), but faster and not suitable for objects, - * allocated using vmalloc(). + * It is not suitable for objects allocated using vmalloc(). * * A passed kernel object must be a slab object or a generic kernel page. * |