1 files changed, 21 insertions, 11 deletions

diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 3595a4c14aba..26b2d92d48b3 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -347,7 +347,7 @@ void ftrace_nmi_exit(void)
 
 /* Add a function return address to the trace stack on thread info.*/
 static int push_return_trace(unsigned long ret, unsigned long long time,
-                                unsigned long func)
+                                unsigned long func, int *depth)
 {
         int index;
 
@@ -365,21 +365,22 @@ static int push_return_trace(unsigned long ret, unsigned long long time,
         current->ret_stack[index].ret = ret;
         current->ret_stack[index].func = func;
         current->ret_stack[index].calltime = time;
+        *depth = index;
 
         return 0;
 }
 
 /* Retrieve a function return address to the trace stack on thread info.*/
-static void pop_return_trace(unsigned long *ret, unsigned long long *time,
-                                unsigned long *func, unsigned long *overrun)
+static void pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret)
 {
         int index;
 
         index = current->curr_ret_stack;
         *ret = current->ret_stack[index].ret;
-        *func = current->ret_stack[index].func;
-        *time = current->ret_stack[index].calltime;
-        *overrun = atomic_read(&current->trace_overrun);
+        trace->func = current->ret_stack[index].func;
+        trace->calltime = current->ret_stack[index].calltime;
+        trace->overrun = atomic_read(&current->trace_overrun);
+        trace->depth = index;
         current->curr_ret_stack--;
 }
 
@@ -390,12 +391,13 @@ static void pop_return_trace(unsigned long *ret, unsigned long long *time,
 unsigned long ftrace_return_to_handler(void)
 {
         struct ftrace_graph_ret trace;
-        pop_return_trace(&trace.ret, &trace.calltime, &trace.func,
-                        &trace.overrun);
+        unsigned long ret;
+
+        pop_return_trace(&trace, &ret);
         trace.rettime = cpu_clock(raw_smp_processor_id());
-        ftrace_graph_function(&trace);
+        ftrace_graph_return(&trace);
 
-        return trace.ret;
+        return ret;
 }
 
 /*
@@ -407,6 +409,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
         unsigned long old;
         unsigned long long calltime;
         int faulted;
+        struct ftrace_graph_ent trace;
         unsigned long return_hooker = (unsigned long)
                                 &return_to_handler;
 
@@ -452,8 +455,15 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
 
         calltime = cpu_clock(raw_smp_processor_id());
 
-        if (push_return_trace(old, calltime, self_addr) == -EBUSY)
+        if (push_return_trace(old, calltime,
+                                self_addr, &trace.depth) == -EBUSY) {
                 *parent = old;
+                return;
+        }
+
+        trace.func = self_addr;
+        ftrace_graph_entry(&trace);
+
 }
 
 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */