[PATCH 02/11] mm: memcontrol: constify obj_cgroup_memcg() and friends

[Tal Zussman <tz2294@columbia.edu>]

obj_cgroup_memcg() and get_mem_cgroup_from_objcg() only read from the
objcg. Constify them.

Signed-off-by: Tal Zussman <tz2294@columbia.edu>
---
 include/linux/memcontrol.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 91ca94667d44..2b3b62e84ab2 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -363,7 +363,7 @@ enum objext_flags {
  *
  * The caller must ensure that the returned memcg won't be released.
  */
-static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg)
+static inline struct mem_cgroup *obj_cgroup_memcg(const struct obj_cgroup *objcg)
 {
 	lockdep_assert_once(rcu_read_lock_held() || lockdep_is_held(&cgroup_mutex));
 	return objcg ? READ_ONCE(objcg->memcg) : NULL;
@@ -472,7 +472,7 @@ static inline struct mem_cgroup *page_memcg_check(const struct page *page)
 	return folio_memcg_check((const struct folio *)page);
 }
 
-static inline struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg)
+static inline struct mem_cgroup *get_mem_cgroup_from_objcg(const struct obj_cgroup *objcg)
 {
 	struct mem_cgroup *memcg;
 
@@ -1036,7 +1036,7 @@ void mem_cgroup_flush_workqueue(void);
 extern int mem_cgroup_init(void);
 #else /* CONFIG_MEMCG */
 
-static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg)
+static inline struct mem_cgroup *obj_cgroup_memcg(const struct obj_cgroup *objcg)
 {
 	return NULL;
 }
@@ -1065,7 +1065,7 @@ static inline struct mem_cgroup *page_memcg_check(const struct page *page)
 	return NULL;
 }
 
-static inline struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg)
+static inline struct mem_cgroup *get_mem_cgroup_from_objcg(const struct obj_cgroup *objcg)
 {
 	return NULL;
 }

-- 
2.39.5