1 files changed, 3 insertions, 46 deletions

diff --git a/arch/loongarch/kernel/unwind_guess.c b/arch/loongarch/kernel/unwind_guess.c
index e2d2e4f3001f..98379b7d4147 100644
--- a/arch/loongarch/kernel/unwind_guess.c
+++ b/arch/loongarch/kernel/unwind_guess.c
@@ -2,37 +2,18 @@
 /*
  * Copyright (C) 2022 Loongson Technology Corporation Limited
  */
-#include <linux/kernel.h>
-#include <linux/ftrace.h>
-
 #include <asm/unwind.h>
 
 unsigned long unwind_get_return_address(struct unwind_state *state)
 {
-	if (unwind_done(state))
-		return 0;
-	else if (state->first)
-		return state->pc;
-
-	return *(unsigned long *)(state->sp);
+	return __unwind_get_return_address(state);
 }
 EXPORT_SYMBOL_GPL(unwind_get_return_address);
 
 void unwind_start(struct unwind_state *state, struct task_struct *task,
 		    struct pt_regs *regs)
 {
-	memset(state, 0, sizeof(*state));
-
-	if (regs) {
-		state->sp = regs->regs[3];
-		state->pc = regs->csr_era;
-	}
-
-	state->task = task;
-	state->first = true;
-
-	get_stack_info(state->sp, state->task, &state->stack_info);
-
+	__unwind_start(state, task, regs);
 	if (!unwind_done(state) && !__kernel_text_address(state->pc))
 		unwind_next_frame(state);
 }
@@ -40,30 +21,6 @@ EXPORT_SYMBOL_GPL(unwind_start);
 
 bool unwind_next_frame(struct unwind_state *state)
 {
-	struct stack_info *info = &state->stack_info;
-	unsigned long addr;
-
-	if (unwind_done(state))
-		return false;
-
-	if (state->first)
-		state->first = false;
-
-	do {
-		for (state->sp += sizeof(unsigned long);
-		     state->sp < info->end;
-		     state->sp += sizeof(unsigned long)) {
-			addr = *(unsigned long *)(state->sp);
-			state->pc = ftrace_graph_ret_addr(state->task, &state->graph_idx,
-					addr, (unsigned long *)(state->sp - GRAPH_FAKE_OFFSET));
-			if (__kernel_text_address(addr))
-				return true;
-		}
-
-		state->sp = info->next_sp;
-
-	} while (!get_stack_info(state->sp, state->task, info));
-
-	return false;
+	return default_next_frame(state);
 }
 EXPORT_SYMBOL_GPL(unwind_next_frame);