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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/arch/sparc/kernel/stacktrace.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 #include <linux/sched.h>
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 #include <linux/sched/debug.h>
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 #include <linux/stacktrace.h>
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@@ -57,9 +58,11 @@
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 			trace->entries[trace->nr_entries++] = pc;
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 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
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 			if ((pc + 8UL) == (unsigned long) &return_to_handler) {
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-				int index = t->curr_ret_stack;
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-				if (t->ret_stack && index >= graph) {
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-					pc = t->ret_stack[index - graph].ret;
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+				struct ftrace_ret_stack *ret_stack;
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+				ret_stack = ftrace_graph_get_ret_stack(t,
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+								       graph);
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+				if (ret_stack) {
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+					pc = ret_stack->ret;
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 					if (trace->nr_entries <
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 					    trace->max_entries)
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 						trace->entries[trace->nr_entries++] = pc;