*/
struct task_struct;
-#ifdef CONFIG_MMU
#define arch_has_single_step() (1)
extern void user_enable_single_step(struct task_struct *);
extern void user_disable_single_step(struct task_struct *);
+#ifdef CONFIG_MMU
#define arch_has_block_step() (1)
extern void user_enable_block_step(struct task_struct *);
#endif