[RFC patch 20/41] backtrace-test: Simplify stack trace handling

[Thomas Gleixner]

Replace the indirection through struct stack_trace by using the storage
array based interfaces.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 kernel/backtracetest.c |   11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

--- a/kernel/backtracetest.c
+++ b/kernel/backtracetest.c
@@ -48,19 +48,14 @@ static void backtrace_test_irq(void)
 #ifdef CONFIG_STACKTRACE
 static void backtrace_test_saved(void)
 {
-	struct stack_trace trace;
 	unsigned long entries[8];
+	unsigned int nent;
 
 	pr_info("Testing a saved backtrace.\n");
 	pr_info("The following trace is a kernel self test and not a bug!\n");
 
-	trace.nr_entries = 0;
-	trace.max_entries = ARRAY_SIZE(entries);
-	trace.entries = entries;
-	trace.skip = 0;
-
-	save_stack_trace(&trace);
-	print_stack_trace(&trace, 0);
+	nent = stack_trace_save(entries, ARRAY_SIZE(entries), 0);
+	stack_trace_print(entries, nent, 0);
 }
 #else
 static void backtrace_test_saved(void)