On Mon, Apr 12, 2021 at 11:53:02AM +0000, Bence Csókás wrote: > While the preamble field _is_ technically big-endian, its value is always 0x2A2A, > which is the same in either endianness, therefore it should be u16 instead. Just replace the assignment with htons(0x2A2A) and be done with that - it's a constant expression and compiler will yield the same assembler.