diff --git a/drivers/input/touchscreen/st/fts_lib/ftsIO.c b/drivers/input/touchscreen/st/fts_lib/ftsIO.c
index d45b54fc84cf..47fb5fe84ad5 100644
--- a/drivers/input/touchscreen/st/fts_lib/ftsIO.c
+++ b/drivers/input/touchscreen/st/fts_lib/ftsIO.c
@@ -82,7 +82,7 @@ int openChannel(struct i2c_client *clt)
 	return OK;
 }
 
-struct device *getDev()
+struct device *getDev(void)
 {
 	if (client != NULL)
 		return &(client->dev);
@@ -90,7 +90,7 @@ struct device *getDev()
 		return NULL;
 }
 
-struct i2c_client *getClient()
+struct i2c_client *getClient(void)
 {
 	if (client != NULL)
 		return client;
diff --git a/drivers/input/touchscreen/st/fts_lib/ftsTime.c b/drivers/input/touchscreen/st/fts_lib/ftsTime.c
index 07d1bf5dba8b..6d21fc857057 100644
--- a/drivers/input/touchscreen/st/fts_lib/ftsTime.c
+++ b/drivers/input/touchscreen/st/fts_lib/ftsTime.c
@@ -92,7 +92,7 @@ int elapsedNanosecond(struct StopWatch *w)
 	return result;
 }
 
-char *timestamp()
+char *timestamp(void)
 {
 	char *result = NULL;
 
diff --git a/drivers/video/fbdev/msm/mdss_mdp.c b/drivers/video/fbdev/msm/mdss_mdp.c
index f89e62d12aef..149b5fca772c 100644
--- a/drivers/video/fbdev/msm/mdss_mdp.c
+++ b/drivers/video/fbdev/msm/mdss_mdp.c
@@ -4868,7 +4868,7 @@ struct mdss_panel_cfg *mdss_panel_intf_type(int intf_val)
 }
 EXPORT_SYMBOL(mdss_panel_intf_type);
 
-struct irq_info *mdss_intr_line()
+struct irq_info *mdss_intr_line(void)
 {
 	return mdss_mdp_hw.irq_info;
 }
diff --git a/drivers/video/fbdev/msm/mdss_util.c b/drivers/video/fbdev/msm/mdss_util.c
index f0fa58dcf8f7..f86c17fbdd99 100644
--- a/drivers/video/fbdev/msm/mdss_util.c
+++ b/drivers/video/fbdev/msm/mdss_util.c
@@ -223,7 +223,7 @@ struct mdss_util_intf mdss_util = {
 	.mdp_probe_done = false
 };
 
-struct mdss_util_intf *mdss_get_util_intf()
+struct mdss_util_intf *mdss_get_util_intf(void)
 {
 	return &mdss_util;
 }