diff --git a/master/Makefile.am b/master/Makefile.am
index 1a0ef30a..2b8bbf77 100644
--- a/master/Makefile.am
+++ b/master/Makefile.am
@@ -67,6 +67,7 @@ noinst_HEADERS = \
 	sdo_request.c sdo_request.h \
 	slave.c slave.h \
 	slave_config.c slave_config.h \
+	smp.h \
 	soe_errors.c \
 	soe_request.c soe_request.h \
 	sync.c sync.h \
diff --git a/master/fsm_master.c b/master/fsm_master.c
index 36a29e2f..11e1e58e 100644
--- a/master/fsm_master.c
+++ b/master/fsm_master.c
@@ -32,6 +32,7 @@
 #ifdef EC_EOE
 #include "ethernet.h"
 #endif
+#include "smp.h"
 
 #include "fsm_master.h"
 #include "fsm_foe.h"
diff --git a/master/globals.h b/master/globals.h
index 4343a9ed..afa2a808 100644
--- a/master/globals.h
+++ b/master/globals.h
@@ -24,14 +24,12 @@
 
 /****************************************************************************/
 
-#ifndef __EC_MASTER_GLOBALS_H__
-#define __EC_MASTER_GLOBALS_H__
+#ifndef MASTER_GLOBALS_H_
+#define MASTER_GLOBALS_H_
 
 #include "../globals.h"
 #include "../include/ecrt.h"
 
-#include <linux/version.h>
-
 /*****************************************************************************
  * EtherCAT master
  ****************************************************************************/
@@ -173,8 +171,7 @@ typedef struct {
  */
 typedef enum {
     EC_DC_32, /**< 32 bit. */
-    EC_DC_64 /*< 64 bit for system time, system time offset and
-               port 0 receive time. */
+    EC_DC_64 /*< 64 bit for system time, time offset and port receive time. */
 } ec_slave_dc_range_t;
 
 /** EtherCAT slave sync signal configuration.
@@ -254,28 +251,6 @@ extern const char *ec_device_names[2]; // only main and backup!
 
 /****************************************************************************/
 
-/* Define SMP macros on kernel versions where they did not exist yet.
- */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 47)
-
-#define smp_store_release(p, v) \
-do { \
-    smp_mb(); \
-    ACCESS_ONCE(*p) = (v); \
-} while (0)
-
-#define smp_load_acquire(p) \
-({ \
-    typeof(*p) ___p1 = ACCESS_ONCE(*p); \
-    smp_mb(); \
-    ___p1; \
-})
-
-#endif
-
-/****************************************************************************/
-
 extern char *ec_master_version_str;
 
 /****************************************************************************/
@@ -335,4 +310,4 @@ typedef struct ec_slave ec_slave_t; /**< \see ec_slave. */
 
 /****************************************************************************/
 
-#endif
+#endif  // MASTER_GLOBALS_H_
diff --git a/master/master.c b/master/master.c
index f92f1869..0c5e653b 100644
--- a/master/master.c
+++ b/master/master.c
@@ -43,6 +43,7 @@
 #include "slave_config.h"
 #include "device.h"
 #include "datagram.h"
+#include "smp.h"
 
 #ifdef EC_EOE
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
diff --git a/master/smp.h b/master/smp.h
new file mode 100644
index 00000000..f8c8fe35
--- /dev/null
+++ b/master/smp.h
@@ -0,0 +1,56 @@
+/*****************************************************************************
+ *
+ *  Copyright (C) 2006-2026  Florian Pose, Ingenieurgemeinschaft IgH
+ *
+ *  This file is part of the IgH EtherCAT master.
+ *
+ *  The file is free software; you can redistribute it and/or modify it under
+ *  the terms of the GNU Lesser General Public License as published by the
+ *  Free Software Foundation; version 2.1 of the License.
+ *
+ *  This file is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+ *  License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this file. If not, see <http://www.gnu.org/licenses/>.
+ *
+ ****************************************************************************/
+
+/** \file
+ * Definitions of Kernel SMP macros.
+ */
+
+/****************************************************************************/
+
+#ifndef MASTER_SMP_H_
+#define MASTER_SMP_H_
+
+#include <linux/version.h>
+
+/****************************************************************************/
+
+/* Define SMP macros on kernel versions where they did not exist yet.
+ */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 47)
+
+#define smp_store_release(p, v) \
+do { \
+    smp_mb(); \
+    ACCESS_ONCE(*p) = (v); \
+} while (0)
+
+#define smp_load_acquire(p) \
+({ \
+    typeof(*p) ___p1 = ACCESS_ONCE(*p); \
+    smp_mb(); \
+    ___p1; \
+})
+
+#endif
+
+/****************************************************************************/
+
+#endif  // MASTER_SMP_H_