From: Miguel Ojeda <ojeda@kernel.org>
Date: Fri, 21 Oct 2022 11:59:56 +0000 (+0200)
Subject: compiler-gcc: document minimum version for `__no_sanitize_coverage__`
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=f39556bc2530c83a22bc11b73c7a46df9a340685;p=linux.git

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
Link: https://lkml.kernel.org/r/20221021115956.9947-5-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Acked-by: Marco Elver <elver@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dan Li <ashimida@linux.alibaba.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 7f2c2bb73815c..7af9e34ec261b 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