Subject: Re: [PATCH v1 1/3] kernel.h: Don't pollute header with single user macros

From: Peter Zijlstra <[email-masked]>
Date: Tue, 13 Jul 2021 14:38:45 +0200

On Tue, Jul 13, 2021 at 11:45:39AM +0300, Andy Shevchenko wrote:
> The COUNT_ARGS() and CONCATENATE() macros are used by a single user.
> Let move them to it.

That seems to be because people like re-implementing it instead of
reusing existing ones:

arch/x86/include/asm/efi.h:#define __efi_nargs__(_0, _1, _2, _3, _4, _5, _6, _7, n, ...)        \
arch/x86/include/asm/rmwcc.h:#define __RMWcc_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n
include/linux/arm-smccc.h:#define ___count_args(_0, _1, _2, _3, _4, _5, _6, _7, _8, x, ...) x
include/linux/kernel.h:#define __COUNT_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n