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    Subject[PATCH V5 01/13] perf: Export perf_assign_events
    Date
    From: "Yan, Zheng" <zheng.z.yan@intel.com>

    Export perf_assign_events so the uncore code can use it to
    schedule events.

    Signed-off-by: Zheng Yan <zheng.z.yan@intel.com>
    ---
    arch/x86/kernel/cpu/perf_event.c | 6 +++---
    arch/x86/kernel/cpu/perf_event.h | 2 ++
    2 files changed, 5 insertions(+), 3 deletions(-)

    diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
    index 9000590..0c9041c 100644
    --- a/arch/x86/kernel/cpu/perf_event.c
    +++ b/arch/x86/kernel/cpu/perf_event.c
    @@ -626,7 +626,7 @@ static bool __perf_sched_find_counter(struct perf_sched *sched)
    c = sched->constraints[sched->state.event];

    /* Prefer fixed purpose counters */
    - if (x86_pmu.num_counters_fixed) {
    + if (c->idxmsk64 & ((u64)-1 << X86_PMC_IDX_FIXED)) {
    idx = X86_PMC_IDX_FIXED;
    for_each_set_bit_from(idx, c->idxmsk, X86_PMC_IDX_MAX) {
    if (!__test_and_set_bit(idx, sched->state.used))
    @@ -693,8 +693,8 @@ static bool perf_sched_next_event(struct perf_sched *sched)
    /*
    * Assign a counter for each event.
    */
    -static int perf_assign_events(struct event_constraint **constraints, int n,
    - int wmin, int wmax, int *assign)
    +int perf_assign_events(struct event_constraint **constraints, int n,
    + int wmin, int wmax, int *assign)
    {
    struct perf_sched sched;

    diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
    index 3df3de9..83238f2 100644
    --- a/arch/x86/kernel/cpu/perf_event.h
    +++ b/arch/x86/kernel/cpu/perf_event.h
    @@ -481,6 +481,8 @@ static inline void __x86_pmu_enable_event(struct hw_perf_event *hwc,

    void x86_pmu_enable_all(int added);

    +int perf_assign_events(struct event_constraint **constraints, int n,
    + int wmin, int wmax, int *assign);
    int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign);

    void x86_pmu_stop(struct perf_event *event, int flags);
    --
    1.7.10.2


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