[PATCH -next] perf/core: Make some symbols static

[Wei Yongjun]

sparse report build warning as follows:

kernel/events/core.c:6493:6: warning: symbol
 'perf_pmu_snapshot_aux' was not declared. Should it be static?
kernel/events/core.c:10545:1: warning: symbol
 'dev_attr_nr_addr_filters' was not declared. Should it be static?
 
'perf_pmu_snapshot_aux' and 'dev_attr_nr_addr_filters' are not used
outside of this file, so mark them static.

Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 kernel/events/core.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 1449553a8d44..9465f30ad981 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6490,10 +6490,10 @@ static unsigned long perf_prepare_sample_aux(struct 
perf_event *event,
        return data->aux_size;
 }
 
-long perf_pmu_snapshot_aux(struct perf_buffer *rb,
-                          struct perf_event *event,
-                          struct perf_output_handle *handle,
-                          unsigned long size)
+static long perf_pmu_snapshot_aux(struct perf_buffer *rb,
+                                 struct perf_event *event,
+                                 struct perf_output_handle *handle,
+                                 unsigned long size)
 {
        unsigned long flags;
        long ret;
@@ -10542,7 +10542,7 @@ static ssize_t nr_addr_filters_show(struct device *dev,
 
        return snprintf(page, PAGE_SIZE - 1, "%d\n", pmu->nr_addr_filters);
 }
-DEVICE_ATTR_RO(nr_addr_filters);
+static DEVICE_ATTR_RO(nr_addr_filters);
 
 static struct idr pmu_idr;