linux-kernel - [PATCH v3 09/14] tools/lib/lockdep: New stacktrace API

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Date:   Mon, 22 Jun 2020 18:42:53 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     peterz@...radead.org
Cc:     mingo@...nel.org, linux-kernel@...r.kernel.org, tglx@...utronix.de,
        jolsa@...hat.com, alexey.budankov@...ux.intel.com,
        songliubraving@...com, acme@...hat.com, allison@...utok.net,
        sashal@...nel.org
Subject: [PATCH v3 09/14] tools/lib/lockdep: New stacktrace API

The kernel switched to using kernel/stacktrace.c, and the API slightly
changed.

Adjust it to make stack traces work again.

Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 tools/include/linux/stacktrace.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/include/linux/stacktrace.h b/tools/include/linux/stacktrace.h
index ae343ac35bfa7..b290b98d883aa 100644
--- a/tools/include/linux/stacktrace.h
+++ b/tools/include/linux/stacktrace.h
@@ -15,10 +15,18 @@ static inline void print_stack_trace(struct stack_trace *trace, int spaces)
 	backtrace_symbols_fd((void **)trace->entries, trace->nr_entries, 1);
 }
 
+static inline void stack_trace_print(const long unsigned int *entries, unsigned int nr, int spaces)
+{
+	backtrace_symbols_fd((void **)entries, nr, 1);
+}
+
 #define save_stack_trace(trace)	\
 	((trace)->nr_entries =	\
 		backtrace((void **)(trace)->entries, (trace)->max_entries))
 
+#define stack_trace_save(e, m, x) \
+	backtrace((void **)(e), (m))
+
 static inline int dump_stack(void)
 {
 	void *array[64];
-- 
2.25.1