m68k: Wire up membarrier

$ ./membarrier_test
membarrier MEMBARRIER_CMD_QUERY syscall available.
membarrier: MEMBARRIER_CMD_SHARED success.
membarrier: tests done!
$

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Greg Ungerer <gerg@uclinux.org>

arch/m68k/include/asm/unistd.h

@@ -4,7 +4,7 @@
 #include <uapi/asm/unistd.h>
 
 
-#define NR_syscalls		374
+#define NR_syscalls		375
 
 #define __ARCH_WANT_OLD_READDIR
 #define __ARCH_WANT_OLD_STAT

arch/m68k/include/uapi/asm/unistd.h

@@ -379,5 +379,6 @@
 #define __NR_recvmmsg		371
 #define __NR_sendmmsg		372
 #define __NR_userfaultfd	373
+#define __NR_membarrier		374
 
 #endif /* _UAPI_ASM_M68K_UNISTD_H_ */

arch/m68k/kernel/syscalltable.S

@@ -394,3 +394,4 @@ ENTRY(sys_call_table)
 	.long sys_recvmmsg
 	.long sys_sendmmsg
 	.long sys_userfaultfd
+	.long sys_membarrier