perf/x86: Fix sparse warnings

FYI, there are new sparse warnings:

 arch/x86/kernel/cpu/perf_event.c:1356:18: sparse: symbol 'events_attr' was not declared. Should it be static?

This patch makes it static and also adds the static keyword to
fix arch/x86/kernel/cpu/perf_event.c:1344:9: warning: symbol
'events_sysfs_show' was not declared.

Signed-off-by: Peter Huewe <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Yuanhan Liu <[email protected]>
Cc: [email protected]
Cc: Jiri Olsa <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

Author: PeterHuewe

arch/x86/kernel/cpu/perf_event.c

@@ -1341,7 +1341,7 @@ static void __init filter_events(struct attribute **attrs)
 	}
 }
 
-ssize_t events_sysfs_show(struct device *dev, struct device_attribute *attr,
+static ssize_t events_sysfs_show(struct device *dev, struct device_attribute *attr,
 			  char *page)
 {
 	struct perf_pmu_events_attr *pmu_attr = \
@@ -1373,7 +1373,7 @@ EVENT_ATTR(ref-cycles,			REF_CPU_CYCLES		);
 
 static struct attribute *empty_attrs;
 
-struct attribute *events_attr[] = {
+static struct attribute *events_attr[] = {
 	EVENT_PTR(CPU_CYCLES),
 	EVENT_PTR(INSTRUCTIONS),
 	EVENT_PTR(CACHE_REFERENCES),