[PATCH v5 2/7] perf/core: Export AUX buffer helpers to modules
Will Deacon
will.deacon at arm.com
Thu Sep 28 07:09:46 PDT 2017
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 at infradead.org>
Signed-off-by: Will Deacon <will.deacon at 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 f684d8e5fa2b..6d9bffe4d6cc 100644
--- a/kernel/events/ring_buffer.c
+++ b/kernel/events/ring_buffer.c
@@ -411,6 +411,7 @@ void *perf_aux_output_begin(struct perf_output_handle *handle,
return NULL;
}
+EXPORT_SYMBOL_GPL(perf_aux_output_begin);
static bool __always_inline rb_need_aux_wakeup(struct ring_buffer *rb)
{
@@ -480,6 +481,7 @@ 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,
@@ -505,6 +507,7 @@ 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)
{
@@ -514,6 +517,7 @@ 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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