I'll be adding lsm cgroup specific helpers that grab
trampoline mutex.

No functional changes.
Reviewed-by: NMartin KaFai Lau <kafai@fb.com>
Signed-off-by: NStanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/r/20220628174314.1216643-2-sdf@google.comSigned-off-by: NAlexei Starovoitov <ast@kernel.org>