linux-kernel - [PATCH 5/5] compiler-gcc: document minimum version for `__no_sanitize_coverage_

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Date:   Fri, 21 Oct 2022 13:59:56 +0200
From:   Miguel Ojeda <ojeda@...nel.org>
To:     Andrey Konovalov <andreyknvl@...il.com>,
        Marco Elver <elver@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Arnd Bergmann <arnd@...db.de>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Kumar Kartikeya Dwivedi <memxor@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Uros Bizjak <ubizjak@...il.com>,
        Dan Li <ashimida@...ux.alibaba.com>,
        Alexander Potapenko <glider@...gle.com>,
        Miguel Ojeda <ojeda@...nel.org>, linux-kernel@...r.kernel.org
Subject: [PATCH 5/5] compiler-gcc: document minimum version for `__no_sanitize_coverage__`

The attribute was added in GCC 12.1.

This will simplify future cleanups, and is closer to what we do
in `compiler_attributes.h`.

Link: https://godbolt.org/z/MGbT76j6G
Signed-off-by: Miguel Ojeda <ojeda@...nel.org>
---
 include/linux/compiler-gcc.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 7f2c2bb73815..7af9e34ec261 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -92,6 +92,9 @@
 
 #define __no_sanitize_undefined __attribute__((__no_sanitize_undefined__))
 
+/*
+ * Only supported since gcc >= 12
+ */
 #if defined(CONFIG_KCOV) && __has_attribute(__no_sanitize_coverage__)
 #define __no_sanitize_coverage __attribute__((__no_sanitize_coverage__))
 #else
-- 
2.38.1