| Frederic Weisbecker | 3f5ec13 | 2008-11-11 23:21:31 +0100 | [diff] [blame^] | 1 | #ifndef _LINUX_TRACE_BOOT_H |
| 2 | #define _LINUX_TRACE_BOOT_H |
| 3 | |
| 4 | /* |
| 5 | * Structure which defines the trace of an initcall. |
| 6 | * You don't have to fill the func field since it is |
| 7 | * only used internally by the tracer. |
| 8 | */ |
| 9 | struct boot_trace { |
| 10 | pid_t caller; |
| 11 | char func[KSYM_NAME_LEN]; |
| 12 | int result; |
| 13 | unsigned long long duration; /* usecs */ |
| 14 | ktime_t calltime; |
| 15 | ktime_t rettime; |
| 16 | }; |
| 17 | |
| 18 | #ifdef CONFIG_BOOT_TRACER |
| 19 | /* Append the trace on the ring-buffer */ |
| 20 | extern void trace_boot(struct boot_trace *it, initcall_t fn); |
| 21 | |
| 22 | /* Tells the tracer that smp_pre_initcall is finished. |
| 23 | * So we can start the tracing |
| 24 | */ |
| 25 | extern void start_boot_trace(void); |
| 26 | |
| 27 | /* Resume the tracing of other necessary events |
| 28 | * such as sched switches |
| 29 | */ |
| 30 | extern void enable_boot_trace(void); |
| 31 | |
| 32 | /* Suspend this tracing. Actually, only sched_switches tracing have |
| 33 | * to be suspended. Initcalls doesn't need it.) |
| 34 | */ |
| 35 | extern void disable_boot_trace(void); |
| 36 | #else |
| 37 | static inline void trace_boot(struct boot_trace *it, initcall_t fn) { } |
| 38 | static inline void start_boot_trace(void) { } |
| 39 | static inline void enable_boot_trace(void) { } |
| 40 | static inline void disable_boot_trace(void) { } |
| 41 | #endif /* CONFIG_BOOT_TRACER */ |
| 42 | |
| 43 | #endif /* __LINUX_TRACE_BOOT_H */ |