[GPRS] add missing header file gprs_gmm.h
diff --git a/openbsc/include/openbsc/Makefile.am b/openbsc/include/openbsc/Makefile.am
index afb62de..cc948fd 100644
--- a/openbsc/include/openbsc/Makefile.am
+++ b/openbsc/include/openbsc/Makefile.am
@@ -7,7 +7,7 @@
 		 silent_call.h mgcp.h meas_rep.h rest_octets.h \
 		 system_information.h handover.h mgcp_internal.h \
 		 vty.h \
-		crc24.h gprs_bssgp.h gprs_llc.h gprs_ns.h \
+		crc24.h gprs_bssgp.h gprs_llc.h gprs_ns.h gprs_gmm.h \
 		gb_proxy.h gprs_sgsn.h gsm_04_08_gprs.h sgsn.h
 
 openbsc_HEADERS = gsm_04_08.h meas_rep.h bsc_api.h
diff --git a/openbsc/include/openbsc/gprs_gmm.h b/openbsc/include/openbsc/gprs_gmm.h
new file mode 100644
index 0000000..44a28cf
--- /dev/null
+++ b/openbsc/include/openbsc/gprs_gmm.h
@@ -0,0 +1,10 @@
+#ifndef _GPRS_GMM_H
+#define _GPRS_GMM_H
+
+int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid,
+			     uint8_t cause, uint8_t pco_len, uint8_t *pco_v);
+
+int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp);
+int gsm0408_gprs_rcvmsg(struct msgb *msg);
+
+#endif /* _GPRS_GMM_H */