Index: libcfa/src/concurrency/io/call.cfa.in
===================================================================
--- libcfa/src/concurrency/io/call.cfa.in	(revision 0d72d45ea31cbbd475ba7bfbaaa64af872033517)
+++ libcfa/src/concurrency/io/call.cfa.in	(revision b9537e6e28ae020f54097b3d63e5a8bebeaf1cde)
@@ -47,37 +47,30 @@
 	#include "kernel/fwd.hfa"
 
-	#if defined(CFA_HAVE_IOSQE_FIXED_FILE) && defined(CFA_HAVE_IOSQE_IO_DRAIN) && defined(CFA_HAVE_IOSQE_ASYNC)
-		#define REGULAR_FLAGS (IOSQE_FIXED_FILE | IOSQE_IO_DRAIN | IOSQE_ASYNC)
-	#elif defined(CFA_HAVE_IOSQE_FIXED_FILE) && defined(CFA_HAVE_IOSQE_ASYNC)
-		#define REGULAR_FLAGS (IOSQE_FIXED_FILE | IOSQE_ASYNC)
-	#elif defined(CFA_HAVE_IOSQE_FIXED_FILE) && defined(CFA_HAVE_IOSQE_IO_DRAIN)
-		#define REGULAR_FLAGS (IOSQE_FIXED_FILE | IOSQE_IO_DRAIN)
-	#elif defined(CFA_HAVE_IOSQE_IO_DRAIN) && defined(CFA_HAVE_IOSQE_ASYNC)
-		#define REGULAR_FLAGS (IOSQE_IO_DRAIN | IOSQE_ASYNC)
-	#elif defined(CFA_HAVE_IOSQE_FIXED_FILE)
-		#define REGULAR_FLAGS (IOSQE_FIXED_FILE)
-	#elif defined(CFA_HAVE_IOSQE_IO_DRAIN)
-		#define REGULAR_FLAGS (IOSQE_IO_DRAIN)
-	#elif defined(CFA_HAVE_IOSQE_ASYNC)
-		#define REGULAR_FLAGS (IOSQE_ASYNC)
-	#else
-		#define REGULAR_FLAGS (0)
-	#endif
-
-	#if defined(CFA_HAVE_IOSQE_IO_LINK) && defined(CFA_HAVE_IOSQE_IO_HARDLINK)
-		#define LINK_FLAGS (IOSQE_IO_LINK | IOSQE_IO_HARDLINK)
-	#elif defined(CFA_HAVE_IOSQE_IO_LINK)
-		#define LINK_FLAGS (IOSQE_IO_LINK)
-	#elif defined(CFA_HAVE_IOSQE_IO_HARDLINK)
-		#define LINK_FLAGS (IOSQE_IO_HARDLINK)
-	#else
-		#define LINK_FLAGS (0)
-	#endif
-
-	#if defined(CFA_HAVE_SPLICE_F_FD_IN_FIXED)
-		#define SPLICE_FLAGS (SPLICE_F_FD_IN_FIXED)
-	#else
-		#define SPLICE_FLAGS (0)
-	#endif
+	static const __u8 REGULAR_FLAGS = 0
+		#if defined(CFA_HAVE_IOSQE_FIXED_FILE)
+			| IOSQE_FIXED_FILE
+		#endif
+		#if defined(CFA_HAVE_IOSQE_IO_DRAIN)
+			| IOSQE_IO_DRAIN
+		#endif
+		#if defined(CFA_HAVE_IOSQE_ASYNC)
+			| IOSQE_ASYNC
+		#endif
+	;
+
+	static const __u32 LINK_FLAGS = 0
+		#if defined(CFA_HAVE_IOSQE_IO_LINK)
+			| IOSQE_IO_LINK
+		#endif
+		#if defined(CFA_HAVE_IOSQE_IO_HARDLINK)
+			| IOSQE_IO_HARDLINK
+		#endif
+	;
+
+	static const __u32 SPLICE_FLAGS = 0
+		#if defined(CFA_HAVE_SPLICE_F_FD_IN_FIXED)
+			| SPLICE_F_FD_IN_FIXED
+		#endif
+	;
 
 	extern [* struct io_uring_sqe, __u32] __submit_alloc( struct __io_data & ring, __u64 data );