linux-kernel - Re: [PATCH] perf annotate: Fix Clang build by adding block in switch case

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] [day] [month] [year] [list]

Message-Id: <176133222994.3710582.4946257287449096710.b4-ty@kernel.org>
Date: Fri, 24 Oct 2025 11:57:09 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: linux-perf-users@...r.kernel.org, acme@...nel.org, 
 James Clark <james.clark@...aro.org>
Cc: irogers@...gle.com, Peter Zijlstra <peterz@...radead.org>, 
 Ingo Molnar <mingo@...hat.com>, Mark Rutland <mark.rutland@....com>, 
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
 Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>, 
 Nathan Chancellor <nathan@...nel.org>, 
 Nick Desaulniers <nick.desaulniers+lkml@...il.com>, 
 Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, 
 Tianyou Li <tianyou.li@...el.com>, Thomas Falcon <thomas.falcon@...el.com>, 
 Zhiguo Zhou <zhiguo.zhou@...el.com>, Wangyang Guo <wangyang.guo@...el.com>, 
 Pan Deng <pan.deng@...el.com>, linux-kernel@...r.kernel.org, 
 llvm@...ts.linux.dev
Subject: Re: [PATCH] perf annotate: Fix Clang build by adding block in
 switch case

On Wed, 22 Oct 2025 12:02:40 +0100, James Clark wrote:
> Clang and GCC disagree with what constitutes a "declaration after
> statement". GCC allows declarations in switch cases without an extra
> block, as long as it's immediately after the label. Clang does not.
> Unfortunately this is the case even in the latest versions of both
> compilers. The only option that makes them behave in the same way is
> -Wpedantic, which can't be enabled in Perf because of the number of
> warnings it generates.
> 
> [...]
Applied to perf-tools-next, thanks!

Best regards,
Namhyung