diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index 8e3083ccd88adcfb0115fdb05695e7e5b187637f..75089f80855d0ca590dc6b9c7e9a2d30011c82ad 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -38,12 +38,13 @@
  * Get contents of register REGNO in task TASK.
  */
 static inline long
-get_reg(struct task_struct *task, long regno, unsigned long __user *datap)
+get_reg(struct task_struct *task, unsigned long regno,
+	unsigned long __user *datap)
 {
 	long tmp;
 	struct pt_regs *regs = task_pt_regs(task);
 
-	if (regno & 3 || regno > PT_LAST_PSEUDO || regno < 0)
+	if (regno & 3 || regno > PT_LAST_PSEUDO)
 		return -EIO;
 
 	switch (regno) {
@@ -74,11 +75,11 @@ get_reg(struct task_struct *task, long regno, unsigned long __user *datap)
  * Write contents of register REGNO in task TASK.
  */
 static inline int
-put_reg(struct task_struct *task, long regno, unsigned long data)
+put_reg(struct task_struct *task, unsigned long regno, unsigned long data)
 {
 	struct pt_regs *regs = task_pt_regs(task);
 
-	if (regno & 3 || regno > PT_LAST_PSEUDO || regno < 0)
+	if (regno & 3 || regno > PT_LAST_PSEUDO)
 		return -EIO;
 
 	switch (regno) {
@@ -369,14 +370,14 @@ long arch_ptrace(struct task_struct *child, long request,
 		return copy_regset_to_user(child, &user_bfin_native_view,
 					   REGSET_GENERAL,
 					   0, sizeof(struct pt_regs),
-					   (void __user *)data);
+					   datap);
 
 	case PTRACE_SETREGS:
 		pr_debug("ptrace: PTRACE_SETREGS\n");
 		return copy_regset_from_user(child, &user_bfin_native_view,
 					     REGSET_GENERAL,
 					     0, sizeof(struct pt_regs),
-					     (const void __user *)data);
+					     datap);
 
 	case_default:
 	default: