proc_gid_seq_operations 2874 fs/proc/base.c 	return proc_id_map_open(inode, file, &proc_gid_seq_operations);
proc_gid_seq_operations  127 include/linux/user_namespace.h extern const struct seq_operations proc_gid_seq_operations;
proc_gid_seq_operations  695 kernel/user_namespace.c const struct seq_operations proc_gid_seq_operations = {