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x86, ftrace, hw-branch-tracer: dump trace on oops

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Dump the branch trace on an oops (based on ftrace_dump_on_oops).

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Markus Metzger
2009-01-19 10:31:01 +01:00
committed by Ingo Molnar
parent 5c5317de14
commit b1818748b0
4 changed files with 41 additions and 8 deletions
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13
include/linux/ftrace.h
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@@ -496,4 +496,17 @@ static inline int test_tsk_trace_graph(struct task_struct *tsk)
#endif /* CONFIG_TRACING */
#ifdef CONFIG_HW_BRANCH_TRACER
void trace_hw_branch(u64 from, u64 to);
void trace_hw_branch_oops(void);
#else /* CONFIG_HW_BRANCH_TRACER */
static inline void trace_hw_branch(u64 from, u64 to) {}
static inline void trace_hw_branch_oops(void) {}
#endif /* CONFIG_HW_BRANCH_TRACER */
#endif /* _LINUX_FTRACE_H */