diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/oprofile/oprof.c | 100 |
1 files changed, 49 insertions, 51 deletions
diff --git a/drivers/oprofile/oprof.c b/drivers/oprofile/oprof.c index fa6cccd87cf8..a48294a8ebe8 100644 --- a/drivers/oprofile/oprof.c +++ b/drivers/oprofile/oprof.c @@ -29,13 +29,6 @@ unsigned long oprofile_backtrace_depth; static unsigned long is_setup; static DEFINE_MUTEX(start_mutex); -#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX - -static void switch_worker(struct work_struct *work); -static DECLARE_DELAYED_WORK(switch_work, switch_worker); - -#endif - /* timer 0 - use performance monitoring hardware if available 1 - use the timer int mechanism regardless @@ -98,9 +91,18 @@ out: #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX +static void switch_worker(struct work_struct *work); +static DECLARE_DELAYED_WORK(switch_work, switch_worker); + static void start_switch_worker(void) { - schedule_delayed_work(&switch_work, oprofile_time_slice); + if (oprofile_ops.switch_events) + schedule_delayed_work(&switch_work, oprofile_time_slice); +} + +static void stop_switch_worker(void) +{ + cancel_delayed_work_sync(&switch_work); } static void switch_worker(struct work_struct *work) @@ -109,6 +111,43 @@ static void switch_worker(struct work_struct *work) start_switch_worker(); } +/* User inputs in ms, converts to jiffies */ +int oprofile_set_timeout(unsigned long val_msec) +{ + int err = 0; + unsigned long time_slice; + + mutex_lock(&start_mutex); + + if (oprofile_started) { + err = -EBUSY; + goto out; + } + + if (!oprofile_ops.switch_events) { + err = -EINVAL; + goto out; + } + + time_slice = msecs_to_jiffies(val_msec); + if (time_slice == MAX_JIFFY_OFFSET) { + err = -EINVAL; + goto out; + } + + oprofile_time_slice = time_slice; + +out: + mutex_unlock(&start_mutex); + return err; + +} + +#else + +static inline void start_switch_worker(void) { } +static inline void stop_switch_worker(void) { } + #endif /* Actually start profiling (echo 1>/dev/oprofile/enable) */ @@ -131,10 +170,7 @@ int oprofile_start(void) if ((err = oprofile_ops.start())) goto out; -#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX - if (oprofile_ops.switch_events) - start_switch_worker(); -#endif + start_switch_worker(); oprofile_started = 1; out: @@ -152,9 +188,7 @@ void oprofile_stop(void) oprofile_ops.stop(); oprofile_started = 0; -#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX - cancel_delayed_work_sync(&switch_work); -#endif + stop_switch_worker(); /* wake up the daemon to read what remains */ wake_up_buffer_waiter(); @@ -188,42 +222,6 @@ post_sync: mutex_unlock(&start_mutex); } -#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX - -/* User inputs in ms, converts to jiffies */ -int oprofile_set_timeout(unsigned long val_msec) -{ - int err = 0; - unsigned long time_slice; - - mutex_lock(&start_mutex); - - if (oprofile_started) { - err = -EBUSY; - goto out; - } - - if (!oprofile_ops.switch_events) { - err = -EINVAL; - goto out; - } - - time_slice = msecs_to_jiffies(val_msec); - if (time_slice == MAX_JIFFY_OFFSET) { - err = -EINVAL; - goto out; - } - - oprofile_time_slice = time_slice; - -out: - mutex_unlock(&start_mutex); - return err; - -} - -#endif - int oprofile_set_backtrace(unsigned long val) { int err = 0; |