diff --git a/Documentation/admin-guide/cgroup-v1/cpusets.rst b/Documentation/admin-guide/cgroup-v1/cpusets.rst
index ae646d621a8ab..7d3415eea05d0 100644
--- a/Documentation/admin-guide/cgroup-v1/cpusets.rst
+++ b/Documentation/admin-guide/cgroup-v1/cpusets.rst
@@ -179,7 +179,7 @@ files describing that cpuset:
  - cpuset.mem_hardwall flag:  is memory allocation hardwalled
  - cpuset.memory_pressure: measure of how much paging pressure in cpuset
  - cpuset.memory_spread_page flag: if set, spread page cache evenly on allowed nodes
- - cpuset.memory_spread_slab flag: if set, spread slab cache evenly on allowed nodes
+ - cpuset.memory_spread_slab flag: OBSOLETE. Doesn't have any function.
  - cpuset.sched_load_balance flag: if set, load balance within CPUs on that cpuset
  - cpuset.sched_relax_domain_level: the searching range when migrating tasks
 
diff --git a/Documentation/admin-guide/cgroup-v1/hugetlb.rst b/Documentation/admin-guide/cgroup-v1/hugetlb.rst
index 0fa724d82abb6..493a8e386700a 100644
--- a/Documentation/admin-guide/cgroup-v1/hugetlb.rst
+++ b/Documentation/admin-guide/cgroup-v1/hugetlb.rst
@@ -65,10 +65,12 @@ files include::
 
 1. Page fault accounting
 
-hugetlb.<hugepagesize>.limit_in_bytes
-hugetlb.<hugepagesize>.max_usage_in_bytes
-hugetlb.<hugepagesize>.usage_in_bytes
-hugetlb.<hugepagesize>.failcnt
+::
+
+  hugetlb.<hugepagesize>.limit_in_bytes
+  hugetlb.<hugepagesize>.max_usage_in_bytes
+  hugetlb.<hugepagesize>.usage_in_bytes
+  hugetlb.<hugepagesize>.failcnt
 
 The HugeTLB controller allows users to limit the HugeTLB usage (page fault) per
 control group and enforces the limit during page fault. Since HugeTLB
@@ -82,10 +84,12 @@ getting SIGBUS.
 
 2. Reservation accounting
 
-hugetlb.<hugepagesize>.rsvd.limit_in_bytes
-hugetlb.<hugepagesize>.rsvd.max_usage_in_bytes
-hugetlb.<hugepagesize>.rsvd.usage_in_bytes
-hugetlb.<hugepagesize>.rsvd.failcnt
+::
+
+  hugetlb.<hugepagesize>.rsvd.limit_in_bytes
+  hugetlb.<hugepagesize>.rsvd.max_usage_in_bytes
+  hugetlb.<hugepagesize>.rsvd.usage_in_bytes
+  hugetlb.<hugepagesize>.rsvd.failcnt
 
 The HugeTLB controller allows to limit the HugeTLB reservations per control
 group and enforces the controller limit at reservation time and at the fault of
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index 875d12598bd2d..0ce6ff0d9c9aa 100644
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -121,11 +121,6 @@ static inline int cpuset_do_page_mem_spread(void)
 	return task_spread_page(current);
 }
 
-static inline int cpuset_do_slab_mem_spread(void)
-{
-	return task_spread_slab(current);
-}
-
 extern bool current_cpuset_is_being_rebound(void);
 
 extern void rebuild_sched_domains(void);
@@ -264,11 +259,6 @@ static inline int cpuset_do_page_mem_spread(void)
 	return 0;
 }
 
-static inline int cpuset_do_slab_mem_spread(void)
-{
-	return 0;
-}
-
 static inline bool current_cpuset_is_being_rebound(void)
 {
 	return false;
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 927bef3a598ad..4237c8748715d 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -3897,6 +3897,7 @@ static struct cftype legacy_files[] = {
 	},
 
 	{
+		/* obsolete, may be removed in the future */
 		.name = "memory_spread_slab",
 		.read_u64 = cpuset_read_u64,
 		.write_u64 = cpuset_write_u64,