2 files changed, 16 insertions, 3 deletions
diff --git a/src/lib/pid_t.h b/src/lib/pid_t.h
new file mode 100644
index 0000000..c6d8e31
--- /dev/null
+++ b/src/lib/pid_t.h
@@ -0,0 +1,15 @@
+#ifndef LIB_PID_T_H
+#define LIB_PID_T_H
+
+/* Process identifier.
+   Moved from lib/user/syscall.h since both kernel-
+   and user-space want the same definition. */
+typedef int pid_t;
+
+#define PID_ERROR ((pid_t) -1)
+
+/* Format specifier for printf(), e.g.:
+   printf ("pid=%"PRPTd"\n", pid); */
+#define PRPTd d
+
+#endif /* lib/pid_t.h */
diff --git a/src/lib/user/syscall.h b/src/lib/user/syscall.h
index 8a9e0c0..a152dd1 100644
--- a/src/lib/user/syscall.h
+++ b/src/lib/user/syscall.h
@@ -4,9 +4,7 @@
 #include <stdbool.h>
 #include <debug.h>
 
-/* Process identifier. */
-typedef int pid_t;
-#define PID_ERROR ((pid_t) -1)
+#include "lib/pid_t.h"
 
 /* Map region identifier. */
 typedef int mapid_t;