diff options
Diffstat (limited to 'include/linux/ftrace.h')
| -rw-r--r-- | include/linux/ftrace.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index 1f5608c11023..dcbbf72a88b1 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -268,6 +268,26 @@ ftrace_init_module(unsigned long *start, unsigned long *end) { } /* + * Structure that defines a return function trace. + */ +struct ftrace_retfunc { + unsigned long ret; /* Return address */ + unsigned long func; /* Current function */ + unsigned long long calltime; + unsigned long long rettime; +}; + +#ifdef CONFIG_FUNCTION_RET_TRACER +/* Type of a callback handler of tracing return function */ +typedef void (*trace_function_return_t)(struct ftrace_retfunc *); + +extern void register_ftrace_return(trace_function_return_t func); +/* The current handler in use */ +extern trace_function_return_t ftrace_function_return; +extern void unregister_ftrace_return(void); +#endif + +/* * Structure which defines the trace of an initcall. * You don't have to fill the func field since it is * only used internally by the tracer. |