search_process_keyrings_rcu
extern key_ref_t search_process_keyrings_rcu(struct keyring_search_context *ctx);
skey_ref = search_process_keyrings_rcu(&ctx);
key_ref = search_process_keyrings_rcu(ctx);
key_ref = search_process_keyrings_rcu(&ctx);
key_ref = search_process_keyrings_rcu(&ctx);
authkey_ref = search_process_keyrings_rcu(&ctx);