blob: 088ea089e31d38ca8f2acb5e57fed5cd77d24f6c [file] [log] [blame]
#include <linux/module.h>
#include <linux/kallsyms.h>
#include <linux/init.h>
* Structure which defines the trace of an initcall
* while it is called.
* You don't have to fill the func field since it is
* only used internally by the tracer.
struct boot_trace_call {
pid_t caller;
char func[KSYM_SYMBOL_LEN];
* Structure which defines the trace of an initcall
* while it returns.
struct boot_trace_ret {
char func[KSYM_SYMBOL_LEN];
int result;
unsigned long long duration; /* nsecs */
/* Append the traces on the ring-buffer */
extern void trace_boot_call(struct boot_trace_call *bt, initcall_t fn);
extern void trace_boot_ret(struct boot_trace_ret *bt, initcall_t fn);
/* Tells the tracer that smp_pre_initcall is finished.
* So we can start the tracing
extern void start_boot_trace(void);
/* Resume the tracing of other necessary events
* such as sched switches
extern void enable_boot_trace(void);
/* Suspend this tracing. Actually, only sched_switches tracing have
* to be suspended. Initcalls doesn't need it.)
extern void disable_boot_trace(void);
static inline
void trace_boot_call(struct boot_trace_call *bt, initcall_t fn) { }
static inline
void trace_boot_ret(struct boot_trace_ret *bt, initcall_t fn) { }
static inline void start_boot_trace(void) { }
static inline void enable_boot_trace(void) { }
static inline void disable_boot_trace(void) { }
#endif /* __LINUX_TRACE_BOOT_H */