perf: phytium: fix phytium_ddr_pmu.c on 6.9

Declare multiple functions as static functions to suppress warnings about
missing prototypes.

Signed-off-by: Mingcong Bai <baimingcong@uniontech.com>

drivers/perf/phytium/phytium_ddr_pmu.c

@@ -87,7 +87,7 @@ static const u32 ddr_counter_reg_offset[] = {
 	DDR_EVENT_RXREQ_WNSF, DDR_EVENT_BANDWIDTH
 };
 
-ssize_t phytium_ddr_pmu_format_sysfs_show(struct device *dev,
+static ssize_t phytium_ddr_pmu_format_sysfs_show(struct device *dev,
 					  struct device_attribute *attr,
 					  char *buf)
 {
@@ -98,7 +98,7 @@ ssize_t phytium_ddr_pmu_format_sysfs_show(struct device *dev,
 	return sprintf(buf, "%s\n", (char *)eattr->var);
 }
 
-ssize_t phytium_ddr_pmu_event_sysfs_show(struct device *dev,
+static ssize_t phytium_ddr_pmu_event_sysfs_show(struct device *dev,
 					 struct device_attribute *attr,
 					 char *page)
 {
@@ -318,7 +318,7 @@ static void phytium_ddr_pmu_unmark_event(struct phytium_ddr_pmu *ddr_pmu,
 	clear_bit(idx, ddr_pmu->pmu_events.used_mask);
 }
 
-int phytium_ddr_pmu_event_init(struct perf_event *event)
+static int phytium_ddr_pmu_event_init(struct perf_event *event)
 {
 	struct hw_perf_event *hwc = &event->hw;
 	struct phytium_ddr_pmu *ddr_pmu;
@@ -355,7 +355,7 @@ int phytium_ddr_pmu_event_init(struct perf_event *event)
 	return 0;
 }
 
-void phytium_ddr_pmu_event_update(struct perf_event *event)
+static void phytium_ddr_pmu_event_update(struct perf_event *event)
 {
 	struct phytium_ddr_pmu *ddr_pmu = to_phytium_ddr_pmu(event->pmu);
 	struct hw_perf_event *hwc = &event->hw;
@@ -365,15 +365,15 @@ void phytium_ddr_pmu_event_update(struct perf_event *event)
 	local64_add(delta, &event->count);
 }
 
-void phytium_ddr_pmu_event_start(struct perf_event *event, int flags)
+static void phytium_ddr_pmu_event_start(struct perf_event *event, int flags)
 {
 	struct hw_perf_event *hwc = &event->hw;
 
 	hwc->state = 0;
 	perf_event_update_userpage(event);
 }
 
-void phytium_ddr_pmu_event_stop(struct perf_event *event, int flags)
+static void phytium_ddr_pmu_event_stop(struct perf_event *event, int flags)
 {
 	struct hw_perf_event *hwc = &event->hw;
 
@@ -383,7 +383,7 @@ void phytium_ddr_pmu_event_stop(struct perf_event *event, int flags)
 		phytium_ddr_pmu_event_update(event);
 }
 
-int phytium_ddr_pmu_event_add(struct perf_event *event, int flags)
+static int phytium_ddr_pmu_event_add(struct perf_event *event, int flags)
 {
 	struct phytium_ddr_pmu *ddr_pmu = to_phytium_ddr_pmu(event->pmu);
 	struct hw_perf_event *hwc = &event->hw;
@@ -401,7 +401,7 @@ int phytium_ddr_pmu_event_add(struct perf_event *event, int flags)
 	return 0;
 }
 
-void phytium_ddr_pmu_event_del(struct perf_event *event, int flags)
+static void phytium_ddr_pmu_event_del(struct perf_event *event, int flags)
 {
 	struct phytium_ddr_pmu *ddr_pmu = to_phytium_ddr_pmu(event->pmu);
 	struct hw_perf_event *hwc = &event->hw;
@@ -421,7 +421,7 @@ void phytium_ddr_pmu_event_del(struct perf_event *event, int flags)
 	ddr_pmu->pmu_events.hw_events[hwc->idx] = NULL;
 }
 
-void phytium_ddr_pmu_enable(struct pmu *pmu)
+static void phytium_ddr_pmu_enable(struct pmu *pmu)
 {
 	struct phytium_ddr_pmu *ddr_pmu = to_phytium_ddr_pmu(pmu);
 	int event_added = bitmap_weight(ddr_pmu->pmu_events.used_mask,
@@ -433,7 +433,7 @@ void phytium_ddr_pmu_enable(struct pmu *pmu)
 	}
 }
 
-void phytium_ddr_pmu_disable(struct pmu *pmu)
+static void phytium_ddr_pmu_disable(struct pmu *pmu)
 {
 	struct phytium_ddr_pmu *ddr_pmu = to_phytium_ddr_pmu(pmu);
 	int event_added = bitmap_weight(ddr_pmu->pmu_events.used_mask,
@@ -666,7 +666,7 @@ static struct platform_driver phytium_ddr_pmu_driver = {
 	.remove = phytium_ddr_pmu_remove,
 };
 
-int phytium_ddr_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
+static int phytium_ddr_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
 {
 	struct phytium_ddr_pmu *ddr_pmu =
 		hlist_entry_safe(node, struct phytium_ddr_pmu, node);