3 files changed, 19 insertions, 12 deletions

diff --git a/arch/x86/kernel/ptrace_32.c b/arch/x86/kernel/ptrace_32.c
index 4619bda470b6..1402a54ef61f 100644
--- a/arch/x86/kernel/ptrace_32.c
+++ b/arch/x86/kernel/ptrace_32.c
@@ -218,7 +218,7 @@ static inline int is_setting_trap_flag(struct task_struct *child, struct pt_regs
         return 0;
 }
 
-static void set_singlestep(struct task_struct *child)
+void user_enable_single_step(struct task_struct *child)
 {
         struct pt_regs *regs = get_child_regs(child);
 
@@ -249,7 +249,7 @@ static void set_singlestep(struct task_struct *child)
         child->ptrace |= PT_DTRACE;
 }
 
-static void clear_singlestep(struct task_struct *child)
+void user_disable_single_step(struct task_struct *child)
 {
         /* Always clear TIF_SINGLESTEP... */
         clear_tsk_thread_flag(child, TIF_SINGLESTEP);
@@ -269,7 +269,7 @@ static void clear_singlestep(struct task_struct *child)
  */
 void ptrace_disable(struct task_struct *child)
 { 
-        clear_singlestep(child);
+        user_disable_single_step(child);
         clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
 }
 
@@ -403,7 +403,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                 }
                 child->exit_code = data;
                 /* make sure the single step bit is not set. */
-                clear_singlestep(child);
+                user_disable_single_step(child);
                 wake_up_process(child);
                 ret = 0;
                 break;
@@ -419,7 +419,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                         break;
                 child->exit_code = SIGKILL;
                 /* make sure the single step bit is not set. */
-                clear_singlestep(child);
+                user_disable_single_step(child);
                 wake_up_process(child);
                 break;
 
@@ -435,7 +435,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                         clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
 
                 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                set_singlestep(child);
+                user_enable_single_step(child);
                 child->exit_code = data;
                 /* give it a chance to run. */
                 wake_up_process(child);
diff --git a/arch/x86/kernel/ptrace_64.c b/arch/x86/kernel/ptrace_64.c
index 8e433b3773d2..7373a99facf3 100644
--- a/arch/x86/kernel/ptrace_64.c
+++ b/arch/x86/kernel/ptrace_64.c
@@ -170,7 +170,7 @@ static int is_setting_trap_flag(struct task_struct *child, struct pt_regs *regs)
         return 0;
 }
 
-static void set_singlestep(struct task_struct *child)
+void user_enable_single_step(struct task_struct *child)
 {
         struct pt_regs *regs = task_pt_regs(child);
 
@@ -201,7 +201,7 @@ static void set_singlestep(struct task_struct *child)
         child->ptrace |= PT_DTRACE;
 }
 
-static void clear_singlestep(struct task_struct *child)
+void user_disable_single_step(struct task_struct *child)
 {
         /* Always clear TIF_SINGLESTEP... */
         clear_tsk_thread_flag(child, TIF_SINGLESTEP);
@@ -221,7 +221,7 @@ static void clear_singlestep(struct task_struct *child)
  */
 void ptrace_disable(struct task_struct *child)
 { 
-        clear_singlestep(child);
+        user_disable_single_step(child);
 }
 
 static int putreg(struct task_struct *child,
@@ -461,7 +461,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                 clear_tsk_thread_flag(child, TIF_SINGLESTEP);
                 child->exit_code = data;
                 /* make sure the single step bit is not set. */
-                clear_singlestep(child);
+                user_disable_single_step(child);
                 wake_up_process(child);
                 ret = 0;
                 break;
@@ -504,7 +504,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                 clear_tsk_thread_flag(child, TIF_SINGLESTEP);
                 child->exit_code = SIGKILL;
                 /* make sure the single step bit is not set. */
-                clear_singlestep(child);
+                user_disable_single_step(child);
                 wake_up_process(child);
                 break;
 
@@ -513,7 +513,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                 if (!valid_signal(data))
                         break;
                 clear_tsk_thread_flag(child,TIF_SYSCALL_TRACE);
-                set_singlestep(child);
+                user_enable_single_step(child);
                 child->exit_code = data;
                 /* give it a chance to run. */
                 wake_up_process(child);
diff --git a/include/asm-x86/ptrace.h b/include/asm-x86/ptrace.h
index 105d1534eaf4..fe75422f034b 100644
--- a/include/asm-x86/ptrace.h
+++ b/include/asm-x86/ptrace.h
@@ -140,6 +140,13 @@ enum {
 
 #ifdef __KERNEL__
 
+/*
+ * These are defined as per linux/ptrace.h, which see.
+ */
+#define arch_has_single_step()  (1)
+extern void user_enable_single_step(struct task_struct *);
+extern void user_disable_single_step(struct task_struct *);
+
 struct user_desc;
 extern int do_get_thread_area(struct task_struct *p, int idx,
                               struct user_desc __user *info);