[PATCH -next] drm/arc: Fix some sparse warnings

[Wei Yongjun <weiyj_lk@xxxxxxx>]

From: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>

Fixes the following sparse warnings:

drivers/gpu/drm/arc/arcpgu_drv.c:52:5: warning:
  symbol 'arcpgu_gem_mmap' was not declared. Should it be static?
drivers/gpu/drm/arc/arcpgu_drv.c:134:48: warning:
  Using plain integer as NULL pointer
drivers/gpu/drm/arc/arcpgu_drv.c:155:5: warning:
  symbol 'arcpgu_unload' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/arc/arcpgu_drv.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/arc/arcpgu_drv.c b/drivers/gpu/drm/arc/arcpgu_drv.c
index 0226ec0..3518d34 100644
--- a/drivers/gpu/drm/arc/arcpgu_drv.c
+++ b/drivers/gpu/drm/arc/arcpgu_drv.c
@@ -49,7 +49,7 @@ static void arcpgu_setup_mode_config(struct drm_device *drm)
 	drm->mode_config.funcs = &arcpgu_drm_modecfg_funcs;
 }
 
-int arcpgu_gem_mmap(struct file *filp, struct vm_area_struct *vma)
+static int arcpgu_gem_mmap(struct file *filp, struct vm_area_struct *vma)
 {
 	int ret;
 
@@ -131,7 +131,7 @@ static int arcpgu_load(struct drm_device *drm)
 		if (ret < 0)
 			return ret;
 	} else {
-		ret = arcpgu_drm_sim_init(drm, 0);
+		ret = arcpgu_drm_sim_init(drm, NULL);
 		if (ret < 0)
 			return ret;
 	}
@@ -152,7 +152,7 @@ static int arcpgu_load(struct drm_device *drm)
 	return 0;
 }
 
-int arcpgu_unload(struct drm_device *drm)
+static int arcpgu_unload(struct drm_device *drm)
 {
 	struct arcpgu_drm_private *arcpgu = drm->dev_private;


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