[S390] secure computing arch backend

Enable secure computing on s390 as well.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/kernel/ptrace.c

@@ -36,7 +36,8 @@
 #include <linux/elf.h>
 #include <linux/regset.h>
 #include <linux/tracehook.h>
-#include <linux/compat.h>
+#include <linux/seccomp.h>
+#include <asm/compat.h>
 #include <asm/segment.h>
 #include <asm/page.h>
 #include <asm/pgtable.h>
@@ -640,6 +641,9 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
 {
 	long ret;
 
+	/* Do the secure computing check first. */
+	secure_computing(regs->gprs[2]);
+
 	/*
 	 * The sysc_tracesys code in entry.S stored the system
 	 * call number to gprs[2].