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The UEFI Platform Initialization Specification and the Unified Extensible Firmware Interface (UEFI) Specification (respectively for PEI and DXE) determine that the signature for these methods must have a VOID return value, but in all cases fields of the given types are initialised from methods matching the CopyMem and SetMem declarations in BaseMemoryLib.h, which have a VOID * return value. There is no guarantee that a function returning a pointer can be safely called by a caller expecting it to return void, even if this works in practice with the calling conventions used, so wrapper methods are more correct. Fixing this is required to be able to compile with cast-function-type-mismatch warning enabled for Xcode and clang toolchains, but it is at least arguably a genuine unwanted mismatch in any case. Signed-off-by: Mike Beaton <mjsbeaton@gmail.com>