bpf, cgroups: clean up kerneldoc warnings

Building with W=1 reveals some bitrot:

  CC      kernel/bpf/cgroup.o
kernel/bpf/cgroup.c:238: warning: Function parameter or member 'flags' not described in '__cgroup_bpf_attach'
kernel/bpf/cgroup.c:367: warning: Function parameter or member 'unused_flags' not described in '__cgroup_bpf_detach'

Add a kerneldoc line for 'flags'.

Fixing the warning for 'unused_flags' is best approached by
removing the unused parameter on the function call.

Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

3 files changed, 4 insertions, 3 deletions

diff --git a/include/linux/bpf-cgroup.h b/include/linux/bpf-cgroup.h
index 588dd5f0bd85..695b2a880d9a 100644
--- a/include/linux/bpf-cgroup.h
+++ b/include/linux/bpf-cgroup.h
@@ -78,7 +78,7 @@ int cgroup_bpf_inherit(struct cgroup *cgrp);
 int __cgroup_bpf_attach(struct cgroup *cgrp, struct bpf_prog *prog,
                         enum bpf_attach_type type, u32 flags);
 int __cgroup_bpf_detach(struct cgroup *cgrp, struct bpf_prog *prog,
-                        enum bpf_attach_type type, u32 flags);
+                        enum bpf_attach_type type);
 int __cgroup_bpf_query(struct cgroup *cgrp, const union bpf_attr *attr,
                        union bpf_attr __user *uattr);
 
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index ab612fe9862f..d78cfec5807d 100644
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -230,6 +230,7 @@ cleanup:
  * @cgrp: The cgroup which descendants to traverse
  * @prog: A program to attach
  * @type: Type of attach operation
+ * @flags: Option flags
  *
  * Must be called with cgroup_mutex held.
  */
@@ -363,7 +364,7 @@ cleanup:
  * Must be called with cgroup_mutex held.
  */
 int __cgroup_bpf_detach(struct cgroup *cgrp, struct bpf_prog *prog,
-                        enum bpf_attach_type type, u32 unused_flags)
+                        enum bpf_attach_type type)
 {
         struct list_head *progs = &cgrp->bpf.progs[type];
         enum bpf_cgroup_storage_type stype;
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index f31bd61c9466..9f617605dacb 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -5996,7 +5996,7 @@ int cgroup_bpf_detach(struct cgroup *cgrp, struct bpf_prog *prog,
         int ret;
 
         mutex_lock(&cgroup_mutex);
-        ret = __cgroup_bpf_detach(cgrp, prog, type, flags);
+        ret = __cgroup_bpf_detach(cgrp, prog, type);
         mutex_unlock(&cgroup_mutex);
         return ret;
 }