linux-kernel - Re: [PATCH v6 1/7] bits: split the definition of the asm and non-asm GENMASK()

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Z8swIt7fqpVAp2P8@smile.fi.intel.com>
Date: Fri, 7 Mar 2025 19:42:58 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: mailhol.vincent@...adoo.fr
Cc: Yury Norov <yury.norov@...il.com>,
	Lucas De Marchi <lucas.demarchi@...el.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Tvrtko Ursulin <tursulin@...ulin.net>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	Andi Shyti <andi.shyti@...ux.intel.com>,
	David Laight <David.Laight@...lab.com>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: Re: [PATCH v6 1/7] bits: split the definition of the asm and non-asm
 GENMASK()

On Sat, Mar 08, 2025 at 01:48:48AM +0900, Vincent Mailhol via B4 Relay wrote:
> From: Vincent Mailhol <mailhol.vincent@...adoo.fr>
> 
> In an upcoming change, GENMASK() and its friends will indirectly
> depend on sizeof() which is not available in asm.
> 
> Instead of adding further complexity to __GENMASK() to make it work
> for both asm and non asm, just split the definition of the two
> variants.

...

> -/*
> - * BUILD_BUG_ON_ZERO is not available in h files included from asm files,
> - * disable the input check if that is the case.
> - */

> +/*
> + * BUILD_BUG_ON_ZERO() is not available in h files included from asm files, so
> + * no input checks in assembly.
> + */

In case of a new version I would reformat this as

/*
 * BUILD_BUG_ON_ZERO() is not available in h files included from asm files,
 * so no input checks in assembly.
 */

It makes easier to review the changes and see that the first line is kept
the same.

-- 
With Best Regards,
Andy Shevchenko