diff options
Diffstat (limited to 'arch/alpha/kernel/time.c')
| -rw-r--r-- | arch/alpha/kernel/time.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/alpha/kernel/time.c b/arch/alpha/kernel/time.c index 1efbed82c0f..eacceb26d9c 100644 --- a/arch/alpha/kernel/time.c +++ b/arch/alpha/kernel/time.c @@ -41,6 +41,7 @@ #include <linux/init.h> #include <linux/bcd.h> #include <linux/profile.h> +#include <linux/perf_event.h> #include <asm/uaccess.h> #include <asm/io.h> @@ -82,6 +83,26 @@ static struct { unsigned long est_cycle_freq; +#ifdef CONFIG_PERF_EVENTS + +DEFINE_PER_CPU(u8, perf_event_pending); + +#define set_perf_event_pending_flag() __get_cpu_var(perf_event_pending) = 1 +#define test_perf_event_pending() __get_cpu_var(perf_event_pending) +#define clear_perf_event_pending() __get_cpu_var(perf_event_pending) = 0 + +void set_perf_event_pending(void) +{ + set_perf_event_pending_flag(); +} + +#else /* CONFIG_PERF_EVENTS */ + +#define test_perf_event_pending() 0 +#define clear_perf_event_pending() + +#endif /* CONFIG_PERF_EVENTS */ + static inline __u32 rpcc(void) { @@ -175,6 +196,11 @@ irqreturn_t timer_interrupt(int irq, void *dev) update_process_times(user_mode(get_irq_regs())); #endif + if (test_perf_event_pending()) { + clear_perf_event_pending(); + perf_event_do_pending(); + } + return IRQ_HANDLED; } |