perf: export perf_event_refresh() to modules
KVM needs one-shot samples, since a PMC programmed to -X will fire after X events and then again after 2^40 events (i.e. variable period). Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1309362157-6596-4-git-send-email-avi@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -955,6 +955,7 @@ extern void perf_pmu_disable(struct pmu *pmu);
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extern void perf_pmu_enable(struct pmu *pmu);
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extern int perf_event_task_disable(void);
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extern int perf_event_task_enable(void);
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extern int perf_event_refresh(struct perf_event *event, int refresh);
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extern void perf_event_update_userpage(struct perf_event *event);
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extern int perf_event_release_kernel(struct perf_event *event);
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extern struct perf_event *
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@ -1149,6 +1150,10 @@ static inline void perf_event_delayed_put(struct task_struct *task) { }
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static inline void perf_event_print_debug(void) { }
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static inline int perf_event_task_disable(void) { return -EINVAL; }
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static inline int perf_event_task_enable(void) { return -EINVAL; }
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static inline int perf_event_refresh(struct perf_event *event, int refresh)
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{
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return -EINVAL;
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}
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static inline void
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perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) { }
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@ -1764,7 +1764,7 @@ out:
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raw_spin_unlock_irq(&ctx->lock);
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}
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static int perf_event_refresh(struct perf_event *event, int refresh)
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int perf_event_refresh(struct perf_event *event, int refresh)
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{
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/*
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* not supported on inherited events
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@ -1777,6 +1777,7 @@ static int perf_event_refresh(struct perf_event *event, int refresh)
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return 0;
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}
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EXPORT_SYMBOL_GPL(perf_event_refresh);
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static void ctx_sched_out(struct perf_event_context *ctx,
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struct perf_cpu_context *cpuctx,
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