linux-kernel - Re: [PATCH 01/13] a2b: add A2B driver core

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Message-ID: <43f4acb9-4409-4b51-9cb6-543bcf42f0ba@web.de>
Date: Sun, 19 May 2024 09:15:19 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: Alvin Šipraga <alsi@...g-olufsen.dk>,
 devicetree@...r.kernel.org, linux-sound@...r.kernel.org,
 linux-i2c@...r.kernel.org, linux-gpio@...r.kernel.org,
 linux-clk@...r.kernel.org, kernel-janitors@...r.kernel.org
Cc: LKML <linux-kernel@...r.kernel.org>, Alvin Šipraga
 <alvin@...s.dk>, Emil Svendsen <emas@...g-olufsen.dk>,
 Andi Shyti <andi.shyti@...nel.org>, Bartosz Golaszewski <brgl@...ev.pl>,
 Conor Dooley <conor+dt@...nel.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Jaroslav Kysela <perex@...ex.cz>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Liam Girdwood <lgirdwood@...il.com>, Linus Walleij
 <linus.walleij@...aro.org>, Mark Brown <broonie@...nel.org>,
 Michael Turquette <mturquette@...libre.com>,
 "Rafael J. Wysocki" <rafael@...nel.org>, Rob Herring <robh@...nel.org>,
 Saravana Kannan <saravanak@...gle.com>, Stephen Boyd <sboyd@...nel.org>,
 Takashi Iwai <tiwai@...e.com>
Subject: Re: [PATCH 01/13] a2b: add A2B driver core

…
> +++ b/drivers/a2b/a2b.c
> @@ -0,0 +1,1252 @@
…
> +#define __a2b_bus_for_each_node(__bus, __node, __i) \
> +	for (__i = 0; __i < A2B_MAX_NODES && (__node = __bus->nodes[__i]); i++)
…

I suggest to reconsider the usage of double underscores for identifiers.
How do you think about to avoid that this software depends on undefined behaviour?
https://wiki.sei.cmu.edu/confluence/display/c/DCL37-C.+Do+not+declare+or+define+a+reserved+identifier

Regards,
Markus