linux-kernel - Re: [PATCH v4 1/2] compiler_types: Introduce __flex

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Message-ID: <202503151406.19A299AF@keescook>
Date: Sat, 15 Mar 2025 14:06:29 -0700
From: Kees Cook <kees@...nel.org>
To: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Cc: Vlastimil Babka <vbabka@...e.cz>, Miguel Ojeda <ojeda@...nel.org>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Nick Desaulniers <nick.desaulniers+lkml@...il.com>,
	Marco Elver <elver@...gle.com>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	linux-hardening@...r.kernel.org, Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Hyeonggon Yoo <42.hyeyoo@...il.com>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>, Jann Horn <jannh@...gle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sasha Levin <sashal@...nel.org>, Jonathan Corbet <corbet@....net>,
	Jakub Kicinski <kuba@...nel.org>,
	Yafang Shao <laoar.shao@...il.com>,
	Tony Ambardar <tony.ambardar@...il.com>,
	Alexander Lobakin <aleksander.lobakin@...el.com>,
	Jan Hendrik Farr <kernel@...rr.cc>,
	Alexander Potapenko <glider@...gle.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-doc@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH v4 1/2] compiler_types: Introduce __flex_counter() and
 family

On Sat, Mar 15, 2025 at 08:47:46PM +0100, Miguel Ojeda wrote:
> On Sat, Mar 15, 2025 at 4:15 AM Kees Cook <kees@...nel.org> wrote:
> >
> > + * clang: https://github.com/llvm/llvm-project/pull/102549
> 
> That is an unmerged PR -- should we link to the merged one?
> 
> Or, better, to the docs, since they seem to exist:
> 
>     https://clang.llvm.org/docs/LanguageExtensions.html#builtin-counted-by-ref

Ah! Perfect. I was looking under builtins and couldn't find it. :) I
will update the link.

-- 
Kees Cook