The patch titled
Subject: compiler-gcc: remove attribute support check for `__no_sanitize_undefined__`
has been added to the -mm mm-unstable branch. Its filename is
compiler-gcc-remove-attribute-support-check-for-__no_sanitize_undefined__.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/compiler-gcc-remove-attribute-support-check-for-__no_sanitize_undefined__.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Miguel Ojeda <ojeda@xxxxxxxxxx>
Subject: compiler-gcc: remove attribute support check for `__no_sanitize_undefined__`
Date: Fri, 21 Oct 2022 13:59:55 +0200
The attribute was added in GCC 4.9, while the minimum GCC version
supported by the kernel is GCC 5.1.
Therefore, remove the check.
Link: https://godbolt.org/z/GrMeo6fYr
Link: https://lkml.kernel.org/r/20221021115956.9947-4-ojeda@xxxxxxxxxx
Signed-off-by: Miguel Ojeda <ojeda@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Dan Li <ashimida@xxxxxxxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx>
Cc: Marco Elver <elver@xxxxxxxxxx>
Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Cc: Uros Bizjak <ubizjak@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/compiler-gcc.h | 4 ----
1 file changed, 4 deletions(-)
--- a/include/linux/compiler-gcc.h~compiler-gcc-remove-attribute-support-check-for-__no_sanitize_undefined__
+++ a/include/linux/compiler-gcc.h
@@ -90,11 +90,7 @@
#define __no_sanitize_thread
#endif
-#if __has_attribute(__no_sanitize_undefined__)
#define __no_sanitize_undefined __attribute__((__no_sanitize_undefined__))
-#else
-#define __no_sanitize_undefined
-#endif
#if defined(CONFIG_KCOV) && __has_attribute(__no_sanitize_coverage__)
#define __no_sanitize_coverage __attribute__((__no_sanitize_coverage__))
_
Patches currently in -mm which might be from ojeda@xxxxxxxxxx are
compiler-gcc-be-consistent-with-underscores-use-for-no_sanitize.patch
compiler-gcc-remove-attribute-support-check-for-__no_sanitize_address__.patch
compiler-gcc-remove-attribute-support-check-for-__no_sanitize_thread__.patch
compiler-gcc-remove-attribute-support-check-for-__no_sanitize_undefined__.patch
compiler-gcc-document-minimum-version-for-__no_sanitize_coverage__.patch
