+ compiler-gcc-remove-attribute-support-check-for-__no_sanitize_address__.patch added to mm-unstable branch

+ compiler-gcc-remove-attribute-support-check-for-__no_sanitize_address__.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: compiler-gcc: remove attribute support check for `__no_sanitize_address__`
has been added to the -mm mm-unstable branch.  Its filename is
     compiler-gcc-remove-attribute-support-check-for-__no_sanitize_address__.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_address__.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@kernel.org>
Subject: compiler-gcc: remove attribute support check for `__no_sanitize_address__`
Date: Fri, 21 Oct 2022 13:59:53 +0200

The attribute was added in GCC 4.8, while the minimum GCC version
supported by the kernel is GCC 5.1.

Therefore, remove the check.

Link: https://godbolt.org/z/84v56vcn8
Link: https://lkml.kernel.org/r/20221021115956.9947-2-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@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: Marco Elver <elver@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 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_address__
+++ a/include/linux/compiler-gcc.h
@@ -82,11 +82,7 @@
 #define __noscs __attribute__((__no_sanitize__("shadow-call-stack")))
 #endif
 
-#if __has_attribute(__no_sanitize_address__)
 #define __no_sanitize_address __attribute__((__no_sanitize_address__))
-#else
-#define __no_sanitize_address
-#endif
 
 #if defined(__SANITIZE_THREAD__) && __has_attribute(__no_sanitize_thread__)
 #define __no_sanitize_thread __attribute__((__no_sanitize_thread__))
_

Patches currently in -mm which might be from ojeda@kernel.org 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