6 files changed, 8 insertions, 6 deletions
diff --git a/LUFA/Drivers/USB/Core/AVR8/Device_AVR8.h b/LUFA/Drivers/USB/Core/AVR8/Device_AVR8.h
index b5dc7e439..39b4cf7d2 100644
--- a/LUFA/Drivers/USB/Core/AVR8/Device_AVR8.h
+++ b/LUFA/Drivers/USB/Core/AVR8/Device_AVR8.h
@@ -212,6 +212,7 @@
 			}
 		
 			#if (USE_INTERNAL_SERIAL != NO_DESCRIPTOR)
+			static inline void USB_Device_GetSerialString(uint16_t* const UnicodeString) ATTR_NON_NULL_PTR_ARG(1);
 			static inline void USB_Device_GetSerialString(uint16_t* const UnicodeString)
 			{
 				uint_reg_t CurrentGlobalInt = GetGlobalInterruptMask();
diff --git a/LUFA/Drivers/USB/Core/AVR8/Pipe_AVR8.h b/LUFA/Drivers/USB/Core/AVR8/Pipe_AVR8.h
index efe0ef1ba..2d9972260 100644
--- a/LUFA/Drivers/USB/Core/AVR8/Pipe_AVR8.h
+++ b/LUFA/Drivers/USB/Core/AVR8/Pipe_AVR8.h
@@ -877,7 +877,7 @@
 			 *  \return Boolean \c true if a pipe bound to the given endpoint address of the specified direction is found,
 			 *          \c false otherwise.
 			 */
-			bool Pipe_IsEndpointBound(const uint8_t EndpointAddress);
+			bool Pipe_IsEndpointBound(const uint8_t EndpointAddress) ATTR_WARN_UNUSED_RESULT;
 
 	/* Private Interface - For use in library only: */
 	#if !defined(__DOXYGEN__)
diff --git a/LUFA/Drivers/USB/Core/HostStandardReq.h b/LUFA/Drivers/USB/Core/HostStandardReq.h
index caa42e322..7ef439d84 100644
--- a/LUFA/Drivers/USB/Core/HostStandardReq.h
+++ b/LUFA/Drivers/USB/Core/HostStandardReq.h
@@ -132,7 +132,7 @@
 			 *
 			 *  \return A value from the \ref USB_Host_SendControlErrorCodes_t enum to indicate the result.
 			 */
-			uint8_t USB_Host_GetDeviceDescriptor(void* const DeviceDescriptorPtr);
+			uint8_t USB_Host_GetDeviceDescriptor(void* const DeviceDescriptorPtr) ATTR_NON_NULL_PTR_ARG(1);
 
 			/** Sends a GET DESCRIPTOR standard request to the attached device, requesting the string descriptor
 			 *  of the specified index. This can be used to easily retrieve string descriptors from the device by
@@ -151,7 +151,7 @@
 			 */
 			uint8_t USB_Host_GetDeviceStringDescriptor(const uint8_t Index,
 			                                           void* const Buffer,
-			                                           const uint8_t BufferLength);
+			                                           const uint8_t BufferLength) ATTR_NON_NULL_PTR_ARG(2);
 
 			/** Retrieves the current feature status of the attached device, via a GET STATUS standard request. The
 			 *  retrieved feature status can then be examined by masking the retrieved value with the various
@@ -165,7 +165,7 @@
 			 *
 			 *  \return A value from the \ref USB_Host_SendControlErrorCodes_t enum to indicate the result.
 			 */
-			uint8_t USB_Host_GetDeviceStatus(uint8_t* const FeatureStatus);
+			uint8_t USB_Host_GetDeviceStatus(uint8_t* const FeatureStatus) ATTR_NON_NULL_PTR_ARG(1);
 
 			/** Clears a stall condition on the given pipe, via a CLEAR FEATURE standard request to the attached device.
 			 *
diff --git a/LUFA/Drivers/USB/Core/StdRequestType.h b/LUFA/Drivers/USB/Core/StdRequestType.h
index 356606e3a..e5cadfe6e 100644
--- a/LUFA/Drivers/USB/Core/StdRequestType.h
+++ b/LUFA/Drivers/USB/Core/StdRequestType.h
@@ -167,7 +167,7 @@
 				uint16_t wValue; /**< wValue parameter of the request. */
 				uint16_t wIndex; /**< wIndex parameter of the request. */
 				uint16_t wLength; /**< Length of the data to transfer in bytes. */
-			} USB_Request_Header_t;
+			} ATTR_PACKED USB_Request_Header_t;
 
 		/* Enums: */
 			/** Enumeration for the various standard request commands. These commands are applicable when the
diff --git a/LUFA/Drivers/USB/Core/UC3/Device_UC3.h b/LUFA/Drivers/USB/Core/UC3/Device_UC3.h
index 5ed86612b..55e4b0cf7 100644
--- a/LUFA/Drivers/USB/Core/UC3/Device_UC3.h
+++ b/LUFA/Drivers/USB/Core/UC3/Device_UC3.h
@@ -198,6 +198,7 @@
 			}
 
 			#if (USE_INTERNAL_SERIAL != NO_DESCRIPTOR)
+			static inline void USB_Device_GetSerialString(uint16_t* const UnicodeString) ATTR_NON_NULL_PTR_ARG(1);
 			static inline void USB_Device_GetSerialString(uint16_t* const UnicodeString)
 			{
 				uint_reg_t CurrentGlobalInt = GetGlobalInterruptMask();
diff --git a/LUFA/Drivers/USB/Core/UC3/Pipe_UC3.h b/LUFA/Drivers/USB/Core/UC3/Pipe_UC3.h
index c9f9eaac2..ae8f0363c 100644
--- a/LUFA/Drivers/USB/Core/UC3/Pipe_UC3.h
+++ b/LUFA/Drivers/USB/Core/UC3/Pipe_UC3.h
@@ -877,7 +877,7 @@
 			 *  \return Boolean \c true if a pipe bound to the given endpoint address of the specified direction is found,
 			 *          \c false otherwise.
 			 */
-			bool Pipe_IsEndpointBound(const uint8_t EndpointAddress);
+			bool Pipe_IsEndpointBound(const uint8_t EndpointAddress) ATTR_WARN_UNUSED_RESULT;
 
 	/* Private Interface - For use in library only: */
 	#if !defined(__DOXYGEN__)