diff --git a/arch/arm/src/sam34/sam_udp.c b/arch/arm/src/sam34/sam_udp.c
index d8dc266375..c7ac175fa1 100644
--- a/arch/arm/src/sam34/sam_udp.c
+++ b/arch/arm/src/sam34/sam_udp.c
@@ -388,8 +388,6 @@ static inline struct sam_ep_s *
 static inline void
               sam_ep_unreserve(struct sam_usbdev_s *priv,
                 struct sam_ep_s *privep);
-static inline bool
-              sam_ep_reserved(struct sam_usbdev_s *priv, int epno);
 static int    sam_ep_configure_internal(struct sam_ep_s *privep,
                 const struct usb_epdesc_s *desc);
 
@@ -2793,20 +2791,6 @@ sam_ep_unreserve(struct sam_usbdev_s *priv, struct sam_ep_s *privep)
   leave_critical_section(flags);
 }
 
-/****************************************************************************
- * Name: sam_ep_reserved
- *
- * Description:
- *   Check if the endpoint has already been allocated.
- *
- ****************************************************************************/
-
-static inline bool
-sam_ep_reserved(struct sam_usbdev_s *priv, int epno)
-{
-  return ((priv->epavail & SAM_EP_BIT(epno)) == 0);
-}
-
 /****************************************************************************
  * Name: sam_ep_configure_internal
  *
diff --git a/arch/arm/src/sama5/sam_udphs.c b/arch/arm/src/sama5/sam_udphs.c
index 35a76cd84c..41cf3823f6 100644
--- a/arch/arm/src/sama5/sam_udphs.c
+++ b/arch/arm/src/sama5/sam_udphs.c
@@ -465,8 +465,6 @@ static inline struct sam_ep_s *
 static inline void
               sam_ep_unreserve(struct sam_usbdev_s *priv,
                 struct sam_ep_s *privep);
-static inline bool
-              sam_ep_reserved(struct sam_usbdev_s *priv, int epno);
 static int    sam_ep_configure_internal(struct sam_ep_s *privep,
                 const struct usb_epdesc_s *desc);
 
@@ -3235,20 +3233,6 @@ sam_ep_unreserve(struct sam_usbdev_s *priv, struct sam_ep_s *privep)
   leave_critical_section(flags);
 }
 
-/****************************************************************************
- * Name: sam_ep_reserved
- *
- * Description:
- *   Check if the endpoint has already been allocated.
- *
- ****************************************************************************/
-
-static inline bool
-sam_ep_reserved(struct sam_usbdev_s *priv, int epno)
-{
-  return ((priv->epavail & SAM_EP_BIT(epno)) == 0);
-}
-
 /****************************************************************************
  * Name: sam_ep_configure_internal
  *
diff --git a/arch/arm/src/samd2l2/sam_usb.c b/arch/arm/src/samd2l2/sam_usb.c
index fbf48121d7..4b5bd5c17f 100644
--- a/arch/arm/src/samd2l2/sam_usb.c
+++ b/arch/arm/src/samd2l2/sam_usb.c
@@ -441,8 +441,6 @@ static inline struct sam_ep_s *
 static inline void
               sam_ep_unreserve(struct sam_usbdev_s *priv,
                 struct sam_ep_s *privep);
-static inline bool
-              sam_ep_reserved(struct sam_usbdev_s *priv, int epno);
 static int    sam_ep_configure_internal(struct sam_ep_s *privep,
                 const struct usb_epdesc_s *desc);
 
@@ -1579,20 +1577,6 @@ sam_ep_unreserve(struct sam_usbdev_s *priv, struct sam_ep_s *privep)
   leave_critical_section(flags);
 }
 
-/****************************************************************************
- * Name: sam_ep_reserved
- *
- * Description:
- *   Check if the endpoint has already been allocated.
- *
- ****************************************************************************/
-
-static inline bool
-sam_ep_reserved(struct sam_usbdev_s *priv, int epno)
-{
-  return ((priv->epavail & SAM_EP_BIT(epno)) == 0);
-}
-
 /****************************************************************************
  * Name: sam_ep_configure
  *
diff --git a/arch/arm/src/samd5e5/sam_usb.c b/arch/arm/src/samd5e5/sam_usb.c
index eb0d963b26..a0d9d356e9 100644
--- a/arch/arm/src/samd5e5/sam_usb.c
+++ b/arch/arm/src/samd5e5/sam_usb.c
@@ -777,8 +777,6 @@ static inline struct sam_ep_s *
 static inline void
               sam_ep_unreserve(struct sam_usbdev_s *priv,
                 struct sam_ep_s *privep);
-static inline bool
-              sam_ep_reserved(struct sam_usbdev_s *priv, int epno);
 static int    sam_ep_configure_internal(struct sam_ep_s *privep,
                 const struct usb_epdesc_s *desc);
 
@@ -2221,20 +2219,6 @@ sam_ep_unreserve(struct sam_usbdev_s *priv, struct sam_ep_s *privep)
   leave_critical_section(flags);
 }
 
-/****************************************************************************
- * Name: sam_ep_reserved
- *
- * Description:
- *   Check if the endpoint has already been allocated.
- *
- ****************************************************************************/
-
-static inline bool
-sam_ep_reserved(struct sam_usbdev_s *priv, int epno)
-{
-  return ((priv->epavail & SAM_EP_BIT(epno)) == 0);
-}
-
 /****************************************************************************
  * Endpoint operations
  ****************************************************************************/
diff --git a/arch/arm/src/samv7/sam_usbdevhs.c b/arch/arm/src/samv7/sam_usbdevhs.c
index 438235798c..afbf4d8cd5 100644
--- a/arch/arm/src/samv7/sam_usbdevhs.c
+++ b/arch/arm/src/samv7/sam_usbdevhs.c
@@ -533,8 +533,6 @@ static inline struct sam_ep_s *
 static inline void
               sam_ep_unreserve(struct sam_usbdev_s *priv,
                 struct sam_ep_s *privep);
-static inline bool
-              sam_ep_reserved(struct sam_usbdev_s *priv, int epno);
 static int    sam_ep_configure_internal(struct sam_ep_s *privep,
                 const struct usb_epdesc_s *desc);
 static inline int
@@ -3592,21 +3590,6 @@ sam_ep_unreserve(struct sam_usbdev_s *priv, struct sam_ep_s *privep)
   leave_critical_section(flags);
 }
 
-/****************************************************************************
- *
- * Name: sam_ep_reserved
- *
- * Description:
- *   Check if the endpoint has already been allocated.
- *
- ****************************************************************************/
-
-static inline bool
-sam_ep_reserved(struct sam_usbdev_s *priv, int epno)
-{
-  return ((priv->epavail & SAM_EP_BIT(epno)) == 0);
-}
-
 /****************************************************************************
  *
  * Name: sam_ep_configure_internal