Example #5984 of why I don't like the kernel's convention of masquerading macros as function by making them lowercase. I wasted so much time deciphering weird compile errors or strange behaviour only to finally realize that one of the function calls in the offending code was actually a macro in disguise.
It's especially bad when some kernel macros, such as wait_event, don't even behave like a function would (evaluating the parameter repeatedly).
One more thing Rust got right by suffixing macros with a mandatory !.
