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    Subject[PATCH 06/10] perf/core: Export AUX buffer helpers to modules
    Date
    Perf PMU drivers using AUX buffers cannot be built as modules unless
    the AUX helpers are exported.

    This patch exports perf_aux_output_{begin,end,skip} and perf_get_aux to
    modules.

    Cc: Peter Zijlstra <peterz@infradead.org>
    Signed-off-by: Will Deacon <will.deacon@arm.com>
    ---
    kernel/events/ring_buffer.c | 4 ++++
    1 file changed, 4 insertions(+)

    diff --git a/kernel/events/ring_buffer.c b/kernel/events/ring_buffer.c
    index 257fa460b846..64158071690c 100644
    --- a/kernel/events/ring_buffer.c
    +++ b/kernel/events/ring_buffer.c
    @@ -397,6 +397,7 @@ void *perf_aux_output_begin(struct perf_output_handle *handle,

    return NULL;
    }
    +EXPORT_SYMBOL_GPL(perf_aux_output_begin);

    /*
    * Commit the data written by hardware into the ring buffer by adjusting
    @@ -458,6 +459,7 @@ void perf_aux_output_end(struct perf_output_handle *handle, unsigned long size,
    rb_free_aux(rb);
    ring_buffer_put(rb);
    }
    +EXPORT_SYMBOL_GPL(perf_aux_output_end);

    /*
    * Skip over a given number of bytes in the AUX buffer, due to, for example,
    @@ -486,6 +488,7 @@ int perf_aux_output_skip(struct perf_output_handle *handle, unsigned long size)

    return 0;
    }
    +EXPORT_SYMBOL_GPL(perf_aux_output_skip);

    void *perf_get_aux(struct perf_output_handle *handle)
    {
    @@ -495,6 +498,7 @@ void *perf_get_aux(struct perf_output_handle *handle)

    return handle->rb->aux_priv;
    }
    +EXPORT_SYMBOL_GPL(perf_get_aux);

    #define PERF_AUX_GFP (GFP_KERNEL | __GFP_ZERO | __GFP_NOWARN | __GFP_NORETRY)

    --
    2.1.4
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