3 files changed, 16 insertions, 4 deletions

diff --git a/arch/um/os-Linux/sys-x86_64/Makefile b/arch/um/os-Linux/sys-x86_64/Makefile
index f67842a7735b..7955e061a678 100644
--- a/arch/um/os-Linux/sys-x86_64/Makefile
+++ b/arch/um/os-Linux/sys-x86_64/Makefile
@@ -3,7 +3,7 @@
 # Licensed under the GPL
 #
 
-obj-$(CONFIG_MODE_SKAS) = registers.o signal.o
+obj-$(CONFIG_MODE_SKAS) = registers.o prctl.o signal.o
 
 USER_OBJS := $(obj-y)
 
diff --git a/arch/um/os-Linux/sys-x86_64/prctl.c b/arch/um/os-Linux/sys-x86_64/prctl.c
new file mode 100644
index 000000000000..9d34eddb517f
--- /dev/null
+++ b/arch/um/os-Linux/sys-x86_64/prctl.c
@@ -0,0 +1,12 @@
+/*
+ * Copyright (C) 2007 Jeff Dike (jdike@{addtoit.com,linux.intel.com})
+ * Licensed under the GPL
+ */
+
+#include <sys/ptrace.h>
+#include <linux/ptrace.h>
+
+int os_arch_prctl(int pid, int code, unsigned long *addr)
+{
+        return ptrace(PTRACE_ARCH_PRCTL, pid, (unsigned long) addr, code);
+}
diff --git a/arch/um/os-Linux/sys-x86_64/registers.c b/arch/um/os-Linux/sys-x86_64/registers.c
index cb8e8a263280..a2d7e0c603f7 100644
--- a/arch/um/os-Linux/sys-x86_64/registers.c
+++ b/arch/um/os-Linux/sys-x86_64/registers.c
@@ -27,12 +27,12 @@ static int move_registers(int pid, int int_op, int fp_op,
                           union uml_pt_regs *regs)
 {
         if(ptrace(int_op, pid, 0, regs->skas.regs) < 0)
-                return(-errno);
+                return -errno;
 
         if(ptrace(fp_op, pid, 0, regs->skas.fp) < 0)
-                return(-errno);
+                return -errno;
 
-        return(0);
+        return 0;
 }
 
 void save_registers(int pid, union uml_pt_regs *regs)