bpf: Annotate implicit fall through in cgroup_dev_func_proto

There is a plan to build the kernel with -Wimplicit-fallthrough
and this place in the code produced a warnings (W=1).

This commit removes the following warning:

  kernel/bpf/cgroup.c:719:6: warning: this statement may fall through [-Wimplicit-fallthrough=]

Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index 9425c2fb872f78f1a0c6cb1bcd00019e78c741ba..ab612fe9862f0668b566722c413d366d598f10ca 100644 (file)
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -718,6 +718,7 @@ cgroup_dev_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
        case BPF_FUNC_trace_printk:
                if (capable(CAP_SYS_ADMIN))
                        return bpf_get_trace_printk_proto();
+               /* fall through */
        default:
                return NULL;
        }