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hrtimer: move timer stats helper functions to hrtimer.c

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There is no reason to make timer_stats_hrtimer_set_start_info and
friends visible to the rest of the kernel. So move all of them to
hrtimer.c.  Also make timer_stats_hrtimer_set_start_info a static
inline function so it gets inlined and we avoid another function call.
Based on a patch by Thomas Gleixner.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
LKML-Reference: <20091210095629.GC4144@osiris.boeblingen.de.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Heiko Carstens 2009-12-10 10:56:29 +01:00 • committed by Thomas Gleixner
parent 41d2e49493
commit 5f201907df
2 changed files with 21 additions and 48 deletions
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43
include/linux/hrtimer.h
View file

@ -440,47 +440,4 @@ extern u64 ktime_divns(const ktime_t kt, s64 div);
/* Show pending timers: */ /* Show pending timers: */
extern void sysrq_timer_list_show(void); extern void sysrq_timer_list_show(void);
/*
* Timer-statistics info:
*/
#ifdef CONFIG_TIMER_STATS
extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
void *timerf, char *comm,
unsigned int timer_flag);
static inline void timer_stats_account_hrtimer(struct hrtimer *timer)
{
if (likely(!timer_stats_active))
return;
timer_stats_update_stats(timer, timer->start_pid, timer->start_site,
timer->function, timer->start_comm, 0);
}
extern void __timer_stats_hrtimer_set_start_info(struct hrtimer *timer,
void *addr);
static inline void timer_stats_hrtimer_set_start_info(struct hrtimer *timer)
{
__timer_stats_hrtimer_set_start_info(timer, __builtin_return_address(0));
}
static inline void timer_stats_hrtimer_clear_start_info(struct hrtimer *timer)
{
timer->start_site = NULL;
}
#else
static inline void timer_stats_account_hrtimer(struct hrtimer *timer)
{
}
static inline void timer_stats_hrtimer_set_start_info(struct hrtimer *timer)
{
}
static inline void timer_stats_hrtimer_clear_start_info(struct hrtimer *timer)
{
}
#endif
#endif #endif

26
kernel/hrtimer.c
View file

@ -756,17 +756,33 @@ static inline void hrtimer_init_timer_hres(struct hrtimer *timer) { }
#endif /* CONFIG_HIGH_RES_TIMERS */ #endif /* CONFIG_HIGH_RES_TIMERS */
#ifdef CONFIG_TIMER_STATS static inline void timer_stats_hrtimer_set_start_info(struct hrtimer *timer)
void __timer_stats_hrtimer_set_start_info(struct hrtimer *timer, void *addr)
{ {
#ifdef CONFIG_TIMER_STATS
if (timer->start_site) if (timer->start_site)
return; return;
timer->start_site = __builtin_return_address(0);
timer->start_site = addr;
memcpy(timer->start_comm, current->comm, TASK_COMM_LEN); memcpy(timer->start_comm, current->comm, TASK_COMM_LEN);
timer->start_pid = current->pid; timer->start_pid = current->pid;
}
#endif #endif
}
static inline void timer_stats_hrtimer_clear_start_info(struct hrtimer *timer)
{
#ifdef CONFIG_TIMER_STATS
timer->start_site = NULL;
#endif
}
static inline void timer_stats_account_hrtimer(struct hrtimer *timer)
{
#ifdef CONFIG_TIMER_STATS
if (likely(!timer_stats_active))
return;
timer_stats_update_stats(timer, timer->start_pid, timer->start_site,
timer->function, timer->start_comm, 0);
#endif
}
/* /*
* Counterpart to lock_hrtimer_base above: * Counterpart to lock_hrtimer_base above: