bpf_lookup_user_key
static inline struct bpf_key *bpf_lookup_user_key(u32 serial, u64 flags)
__bpf_kfunc struct bpf_key *bpf_lookup_user_key(s32 serial, u64 flags)
struct bpf_key *bpf_lookup_user_key(__s32 serial, __u64 flags) __ksym;
extern struct bpf_key *bpf_lookup_user_key(__s32 serial, __u64 flags) __ksym;