linux-kernel - Re: [PATCH] kcov: add __no_sanitize_coverage to fix noinstr for all architectures

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Message-ID: <CANiq72krX9PU14wFsQyW_CJEjTS-TT8wyhBVZZbC132Gz5XO-Q@mail.gmail.com>
Date:   Tue, 25 May 2021 20:25:20 +0200
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Marco Elver <elver@...gle.com>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Will Deacon <will@...nel.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Arvind Sankar <nivedita@...m.mit.edu>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Arnd Bergmann <arnd@...db.de>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH] kcov: add __no_sanitize_coverage to fix noinstr for all architectures

On Tue, May 25, 2021 at 7:59 PM Marco Elver <elver@...gle.com> wrote:
>
> +#if defined(CONFIG_KCOV) && CONFIG_CLANG_VERSION >= 130000

Is there any reason why Clang does not implement
`__has_attribute(__no_sanitize_coverage__)` like GCC? That way we can
merge both (perhaps even in `compiler_attributes.h`).

Cheers,
Miguel