Using the stricter "./tools/docs/kernel-doc -Wall -v" to verify proper
formatting of documentation comments includes warnings related to return
markup on functions that are omitted during the default verification
checks. This stricter verification reports a couple of missing return
descriptions in resctrl:

    Warning: .../fs/resctrl/rdtgroup.c:1536 No description found for return value of 'rdtgroup_cbm_to_size'
    Warning: .../fs/resctrl/rdtgroup.c:3131 No description found for return value of 'mon_get_kn_priv'
    Warning: .../fs/resctrl/rdtgroup.c:3523 No description found for return value of 'cbm_ensure_valid'
    Warning: .../fs/resctrl/monitor.c:238 No description found for return value of 'resctrl_find_cleanest_closid'

Add the missing return descriptions.

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
---
 fs/resctrl/monitor.c  | 2 ++
 fs/resctrl/rdtgroup.c | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/fs/resctrl/monitor.c b/fs/resctrl/monitor.c
index 0cd5476a483a..93db7c1cd7be 100644
--- a/fs/resctrl/monitor.c
+++ b/fs/resctrl/monitor.c
@@ -234,6 +234,8 @@ static struct rmid_entry *resctrl_find_free_rmid(u32 closid)
  *
  * When the CLOSID and RMID are independent numbers, the first free CLOSID will
  * be returned.
+ *
+ * Return: Free CLOSID on success, < 0 on failure.
  */
 int resctrl_find_cleanest_closid(void)
 {
diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c
index ba8d503551cd..3c9508fc558d 100644
--- a/fs/resctrl/rdtgroup.c
+++ b/fs/resctrl/rdtgroup.c
@@ -1519,6 +1519,8 @@ static ssize_t rdtgroup_mode_write(struct kernfs_open_file *of,
  *
  * @cbm is unsigned long, even if only 32 bits are used to make the
  * bitmap functions work correctly.
+ *
+ * Return: size in bytes, 0 on failure.
  */
 unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r,
 				  struct rdt_ctrl_domain *d, unsigned long cbm)
@@ -3102,6 +3104,8 @@ static void rmdir_all_sub(void)
  * @mevt:   The type of event file being created.
  * @do_sum: Whether SNC summing monitors are being created. Only set
  *	    when @rid == RDT_RESOURCE_L3.
+ *
+ * Return: Pointer to mon_data private data of the event, NULL on failure.
  */
 static struct mon_data *mon_get_kn_priv(enum resctrl_res_level rid, int domid,
 					struct mon_evt *mevt,
@@ -3496,6 +3500,8 @@ static int mkdir_mondata_all(struct kernfs_node *parent_kn,
  * resource group is initialized. The user can follow this with a
  * modification to the CBM if the default does not satisfy the
  * requirements.
+ *
+ * Return: A CBM that is valid for resource @r.
  */
 static u32 cbm_ensure_valid(u32 _val, struct rdt_resource *r)
 {
-- 
2.50.1