diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h
index a83113225797..e09071a720f0 100644
--- a/drivers/hwtracing/coresight/coresight-priv.h
+++ b/drivers/hwtracing/coresight/coresight-priv.h
@@ -57,10 +57,8 @@ struct cs_off_attribute {
 	u32 off;
 };
 
-extern ssize_t coresight_simple_show32(struct device *_dev,
-				     struct device_attribute *attr, char *buf);
-extern ssize_t coresight_simple_show_pair(struct device *_dev,
-				     struct device_attribute *attr, char *buf);
+ssize_t coresight_simple_show32(struct device *_dev, struct device_attribute *attr, char *buf);
+ssize_t coresight_simple_show_pair(struct device *_dev, struct device_attribute *attr, char *buf);
 
 #define coresight_simple_reg32(name, offset)				\
 	(&((struct cs_off_attribute[]) {				\
@@ -155,8 +153,8 @@ void coresight_remove_links(struct coresight_device *orig,
 u32 coresight_get_sink_id(struct coresight_device *csdev);
 
 #if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM3X)
-extern int etm_readl_cp14(u32 off, unsigned int *val);
-extern int etm_writel_cp14(u32 off, u32 val);
+int etm_readl_cp14(u32 off, unsigned int *val);
+int etm_writel_cp14(u32 off, u32 val);
 #else
 static inline int etm_readl_cp14(u32 off, unsigned int *val) { return 0; }
 static inline int etm_writel_cp14(u32 off, u32 val) { return 0; }
@@ -167,8 +165,8 @@ struct cti_assoc_op {
 	void (*remove)(struct coresight_device *csdev);
 };
 
-extern void coresight_set_cti_ops(const struct cti_assoc_op *cti_op);
-extern void coresight_remove_cti_ops(void);
+void coresight_set_cti_ops(const struct cti_assoc_op *cti_op);
+void coresight_remove_cti_ops(void);
 
 /*
  * Macros and inline functions to handle CoreSight UCI data and driver
diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index 11808aee9d1d..2b43698c0b25 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -642,26 +642,23 @@ static inline void coresight_set_mode(struct coresight_device *csdev,
 	local_set(&csdev->mode, new_mode);
 }
 
-extern struct coresight_device *
-coresight_register(struct coresight_desc *desc);
-extern void coresight_unregister(struct coresight_device *csdev);
-extern int coresight_enable_sysfs(struct coresight_device *csdev);
-extern void coresight_disable_sysfs(struct coresight_device *csdev);
-extern int coresight_timeout(struct csdev_access *csa, u32 offset,
-			     int position, int value);
-
-extern int coresight_claim_device(struct coresight_device *csdev);
-extern int coresight_claim_device_unlocked(struct coresight_device *csdev);
-
-extern void coresight_disclaim_device(struct csdev_access *csa);
-extern void coresight_disclaim_device_unlocked(struct csdev_access *csa);
+struct coresight_device *coresight_register(struct coresight_desc *desc);
+void coresight_unregister(struct coresight_device *csdev);
+int coresight_enable_sysfs(struct coresight_device *csdev);
+void coresight_disable_sysfs(struct coresight_device *csdev);
+int coresight_timeout(struct csdev_access *csa, u32 offset, int position, int value);
+
+int coresight_claim_device(struct coresight_device *csdev);
+int coresight_claim_device_unlocked(struct coresight_device *csdev);
+
+void coresight_disclaim_device(struct csdev_access *csa);
+void coresight_disclaim_device_unlocked(struct csdev_access *csa);
 int coresight_reset_claim_unlocked(struct csdev_access *csa);
 int coresight_reset_claim(struct csdev_access *csa);
 
-extern char *coresight_alloc_device_name(struct coresight_dev_list *devs,
-					 struct device *dev);
+char *coresight_alloc_device_name(struct coresight_dev_list *devs, struct device *dev);
 
-extern bool coresight_loses_context_with_cpu(struct device *dev);
+bool coresight_loses_context_with_cpu(struct device *dev);
 
 u32 coresight_relaxed_read32(struct coresight_device *csdev, u32 offset);
 u32 coresight_read32(struct coresight_device *csdev, u32 offset);
@@ -674,8 +671,8 @@ void coresight_relaxed_write64(struct coresight_device *csdev,
 			       u64 val, u32 offset);
 void coresight_write64(struct coresight_device *csdev, u64 val, u32 offset);
 
-extern int coresight_get_cpu(struct device *dev);
-extern int coresight_get_static_trace_id(struct device *dev, u32 *id);
+int coresight_get_cpu(struct device *dev);
+int coresight_get_static_trace_id(struct device *dev, u32 *id);
 
 struct coresight_platform_data *coresight_get_platform_data(struct device *dev);
 struct coresight_connection *
