kernel/bpf/cgroup.c

613 	struct bpf_prog *old_prog = NULL;
662 		old_prog = pl->prog;
697 	if (old_prog) {
699 			bpf_trampoline_unlink_cgroup_shim(old_prog);
700 		bpf_prog_put(old_prog);
712 	if (old_prog) {
713 		pl->prog = old_prog;
717 	if (!old_prog) {
798 	struct bpf_prog *old_prog;
821 	old_prog = xchg(&link->link.prog, new_prog);
823 	bpf_prog_put(old_prog);
828 			      struct bpf_prog *old_prog)
841 	if (old_prog && link->prog != old_prog) {
954 	struct bpf_prog *old_prog;
981 	old_prog = pl->prog;
987 		pl->prog = old_prog;
989 		purge_effective_progs(cgrp, old_prog, link, atype);
999 	if (old_prog) {
1001 			bpf_trampoline_unlink_cgroup_shim(old_prog);
1002 		bpf_prog_put(old_prog);