Software :: Error: Was Not Declared In This Scope Compilation?

im getting the following compilation error when trying to compile a file under /proc using 5.5 RHEL

[code]
* procfs1.c - create a "file" in /proc
*
*/
#include <linux/module.h> /* Specifically, a module */
#include <linux/kernel.h> /* We're doing kernel work */
#include <linux/proc_fs.h> /* Necessary because we use the proc fs */
#define procfs_name "helloworld"
code....