linux-kernel - Re: [PATCH v1 13/13] tools headers: Rename noinline to _

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: <CAKwvOdkGALie1d6oNXKNT8vwGmHbymsQ-dv-i0U_SQGFrhEJew@mail.gmail.com>
Date: Mon, 11 Mar 2024 09:21:06 -0700
From: Nick Desaulniers <ndesaulniers@...gle.com>
To: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Ian Rogers <irogers@...gle.com>, Arnd Bergmann <arnd@...db.de>, 
	Andrii Nakryiko <andrii@...nel.org>, Alexei Starovoitov <ast@...nel.org>, 
	Daniel Borkmann <daniel@...earbox.net>, Martin KaFai Lau <martin.lau@...ux.dev>, Song Liu <song@...nel.org>, 
	Yonghong Song <yonghong.song@...ux.dev>, John Fastabend <john.fastabend@...il.com>, 
	KP Singh <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...gle.com>, Hao Luo <haoluo@...gle.com>, 
	Jiri Olsa <jolsa@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
	Adrian Hunter <adrian.hunter@...el.com>, Paolo Bonzini <pbonzini@...hat.com>, 
	Shuah Khan <shuah@...nel.org>, Kees Cook <keescook@...omium.org>, 
	"Gustavo A. R. Silva" <gustavoars@...nel.org>, Nathan Chancellor <nathan@...nel.org>, 
	Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, 
	Andrew Morton <akpm@...ux-foundation.org>, Liam Howlett <liam.howlett@...cle.com>, 
	Miguel Ojeda <ojeda@...nel.org>, Will Deacon <will@...nel.org>, Mark Brown <broonie@...nel.org>, 
	David Laight <David.Laight@...lab.com>, Shunsuke Mie <mie@...l.co.jp>, 
	Yafang Shao <laoar.shao@...il.com>, Kui-Feng Lee <kuifeng@...a.com>, 
	James Clark <james.clark@....com>, Nick Forrington <nick.forrington@....com>, 
	Leo Yan <leo.yan@...ux.dev>, German Gomez <german.gomez@....com>, Rob Herring <robh@...nel.org>, 
	John Garry <john.g.garry@...cle.com>, Sean Christopherson <seanjc@...gle.com>, 
	Anup Patel <anup@...infault.org>, Fuad Tabba <tabba@...gle.com>, 
	Andrew Jones <ajones@...tanamicro.com>, Chao Peng <chao.p.peng@...ux.intel.com>, 
	Haibo Xu <haibo1.xu@...el.com>, Peter Xu <peterx@...hat.com>, 
	Vishal Annapurve <vannapurve@...gle.com>, linux-kernel@...r.kernel.org, 
	linux-arch@...r.kernel.org, bpf@...r.kernel.org, 
	linux-perf-users@...r.kernel.org, kvm@...r.kernel.org, 
	linux-kselftest@...r.kernel.org, linux-hardening@...r.kernel.org, 
	llvm@...ts.linux.dev, Christopher Di Bella <cjdb@...gle.com>
Subject: Re: [PATCH v1 13/13] tools headers: Rename noinline to __noinline

On Mon, Mar 11, 2024 at 8:44 AM Michael S. Tsirkin <mst@...hat.com> wrote:
>
> On Sat, Mar 09, 2024 at 06:05:08PM -0800, Ian Rogers wrote:
> > An issue was reported with clang and llvm libc where the noinline
> > attribute [1] was being expanded due to the #define in
> > linux/compiler.h (now in compiler_attributes.h). The expansion caused
> > the __attribute__ to appear twice and break the build. To avoid this
> > conflict, rename noinline to __noinline which is more consistent with
> > other compiler attributes.
> >
> > [1] https://clang.llvm.org/docs/AttributeReference.html#noinline
>
> Following this link, I don't see __noinline there - only __noinline__ and
> noinline. What's up?

__noinline (which is what this patch is changing the preprocessor
define to) will not be expanded in the presence of
__attribute__((__noinline__)), __attribute__((noinline)), or
[[gnu::inline]], unlike the previous macro definition.

-- 
Thanks,
~Nick Desaulniers