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Groups > linux.kernel > #1584625

[PATCH 1/4] perf: Export AUX buffer helpers to modules

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From: Will Deacon <will.deacon@arm.com>

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>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.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 257fa460b8..6415807169 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)
 
-- 
2.11.0

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Thread

[PATCH 0/4] perf, pt, coresight: AUX flags and VMX update Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2017-02-20 14:40 +0100
  [PATCH 2/4] perf: Keep AUX flags in the output handle Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2017-02-20 14:50 +0100
    Re: [PATCH 2/4] perf: Keep AUX flags in the output handle Mathieu Poirier <mathieu.poirier@linaro.org> - 2017-02-20 21:50 +0100
    Re: [PATCH 2/4] perf: Keep AUX flags in the output handle Will Deacon <will.deacon@arm.com> - 2017-02-21 11:50 +0100
      Re: [PATCH 2/4] perf: Keep AUX flags in the output handle Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2017-02-21 12:00 +0100
  [PATCH 1/4] perf: Export AUX buffer helpers to modules Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2017-02-20 14:50 +0100
  [PATCH 3/4] perf: Add a flag for partial AUX records Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2017-02-20 14:50 +0100
  [PATCH 4/4] perf/x86/intel/pt: Handle VMX better Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2017-02-20 15:00 +0100
  Re: [PATCH 0/4] perf, pt, coresight: AUX flags and VMX update Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2017-02-20 16:30 +0100
    Re: [PATCH 0/4] perf, pt, coresight: AUX flags and VMX update Adrian Hunter <adrian.hunter@intel.com> - 2017-02-20 16:50 +0100
      Re: [PATCH 0/4] perf, pt, coresight: AUX flags and VMX update Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-02-20 17:20 +0100
        Re: [PATCH 0/4] perf, pt, coresight: AUX flags and VMX update Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2017-02-20 17:40 +0100

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