cifs: remove uneeded __KERNEL__ block from cifsacl.h

...and make those symbols static in cifsacl.c. Nothing outside
of that file refers to them.
Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>

fs/cifs/cifsacl.c

@@ -42,7 +42,7 @@ static const struct cifs_sid sid_authusers = {
 /* group users */
 static const struct cifs_sid sid_user = {1, 2 , {0, 0, 0, 0, 0, 5}, {} };
 
-const struct cred *root_cred;
+static const struct cred *root_cred;
 
 static void
 shrink_idmap_tree(struct rb_root *root, int nr_to_scan, int *nr_rem,
@@ -187,7 +187,7 @@ cifs_idmap_key_destroy(struct key *key)
 	kfree(key->payload.data);
 }
 
-struct key_type cifs_idmap_key_type = {
+static struct key_type cifs_idmap_key_type = {
 	.name        = "cifs.idmap",
 	.instantiate = cifs_idmap_key_instantiate,
 	.destroy     = cifs_idmap_key_destroy,

fs/cifs/cifsacl.h

@@ -109,9 +109,4 @@ struct cifs_sid_id {
 	struct cifs_sid sid;
 };
 
-#ifdef __KERNEL__
-extern struct key_type cifs_idmap_key_type;
-extern const struct cred *root_cred;
-#endif /* KERNEL */
-
 #endif /* _CIFSACL_H */