Merge tag 'docs-4.9-2' of git://git.lwn.net/linux

[cascardo/linux.git] / arch / x86 / kernel / unwind_guess.c

diff --git a/arch/x86/kernel/unwind_guess.c b/arch/x86/kernel/unwind_guess.c
index b5a834c..9298993 100644 (file)
--- a/arch/x86/kernel/unwind_guess.c
+++ b/arch/x86/kernel/unwind_guess.c
@@ -5,6 +5,16 @@
 #include <asm/stacktrace.h>
 #include <asm/unwind.h>
 
+unsigned long unwind_get_return_address(struct unwind_state *state)
+{
+       if (unwind_done(state))
+               return 0;
+
+       return ftrace_graph_ret_addr(state->task, &state->graph_idx,
+                                    *state->sp, state->sp);
+}
+EXPORT_SYMBOL_GPL(unwind_get_return_address);
+
 bool unwind_next_frame(struct unwind_state *state)
 {
        struct stack_info *info = &state->stack_info;