* Peter Zijlstra:

quoted

The default Linux calling conventions are all of the cdecl family,
where the caller pops the argument off the stack.  You didn't quote
enough to context to tell whether other calling conventions matter in
your case.

This is strictly in-kernel, and I think we're all cdecl, of which the
important part is caller-cleanup. The function compiles to:

	RET

so whatever the arguments are is irrelevant.

Yes, then the stub is ABI-compatible, as far as I know.