On Sun, Jan 28, 2018 at 12:42:24PM -0800, Linus Torvalds wrote: > The 64-bit argument for 32-bit case would end up having to have a few > more of those architecture-specific oddities. So not just > "argument1(ptregs)", but "argument2_32_64(ptregs)" or something that > says "get me argument 2, when the first argument is 32-bit and I want > a 64-bit one".
Yeah, but... You either get to give SYSCALL_DEFINE more than just the number of arguments (SYSCALL_DEFINE_WDDW) or you need to go for rather grotty macros to pick that information. That's pretty much what I'd tried; it hadn't been fun at all...
