compile success for libsepl in kernel

kernel/libsepol/include/sepol/interfaces.h

@@ -0,0 +1,51 @@
+#ifndef __SEPOL_INTERFACES_H_
+#define __SEPOL_INTERFACES_H_
+
+#include <sepol/policydb.h>
+#include <sepol/iface_record.h>
+#include <sepol/handle.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Return the number of interfaces */
+extern int sepol_iface_count(sepol_handle_t * handle,
+			     const sepol_policydb_t * policydb,
+			     unsigned int *response);
+
+/* Check if an interface exists */
+extern int sepol_iface_exists(sepol_handle_t * handle,
+			      const sepol_policydb_t * policydb,
+			      const sepol_iface_key_t * key, int *response);
+
+/* Query an interface - returns the interface, 
+ * or NULL if not found */
+extern int sepol_iface_query(sepol_handle_t * handle,
+			     const sepol_policydb_t * policydb,
+			     const sepol_iface_key_t * key,
+			     sepol_iface_t ** response);
+
+/* Modify an interface, or add it, if the key
+ * is not found */
+extern int sepol_iface_modify(sepol_handle_t * handle,
+			      sepol_policydb_t * policydb,
+			      const sepol_iface_key_t * key,
+			      const sepol_iface_t * data);
+
+/* Iterate the interfaces
+ * The handler may return:
+ * -1 to signal an error condition,
+ * 1 to signal successful exit
+ * 0 to signal continue */
+
+extern int sepol_iface_iterate(sepol_handle_t * handle,
+			       const sepol_policydb_t * policydb,
+			       int (*fn) (const sepol_iface_t * iface,
+					  void *fn_arg), void *arg);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif