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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id u10sm7423363pjf.46.2021.09.13.09.26.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Sep 2021 09:26:39 -0700 (PDT) Date: Mon, 13 Sep 2021 09:26:38 -0700 From: Kees Cook To: Nick Desaulniers Cc: Andrew Morton , Linus Torvalds , Rasmus Villemoes , Nathan Chancellor , Masahiro Yamada , Joe Perches , Arnd Bergmann , Stephen Rothwell , llvm@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH 09/10] compiler-gcc.h: drop checks for older GCC versions Message-ID: <202109130926.15C4D3486F@keescook> References: <20210910234047.1019925-1-ndesaulniers@google.com> <20210910234047.1019925-10-ndesaulniers@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210910234047.1019925-10-ndesaulniers@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Sep 10, 2021 at 04:40:46PM -0700, Nick Desaulniers wrote: > Now that GCC 5.1 is the minimally supported default, drop the values we > don't use. > > Signed-off-by: Nick Desaulniers > --- > include/linux/compiler-gcc.h | 4 +--- > tools/include/linux/compiler-gcc.h | 4 +--- > 2 files changed, 2 insertions(+), 6 deletions(-) > > diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h > index 3f7f6fa0e051..fd82ce169ce9 100644 > --- a/include/linux/compiler-gcc.h > +++ b/include/linux/compiler-gcc.h > @@ -98,10 +98,8 @@ > > #if GCC_VERSION >= 70000 > #define KASAN_ABI_VERSION 5 > -#elif GCC_VERSION >= 50000 > +#else > #define KASAN_ABI_VERSION 4 > -#elif GCC_VERSION >= 40902 > -#define KASAN_ABI_VERSION 3 > #endif > > #if __has_attribute(__no_sanitize_address__) Reviewed-by: Kees Cook > diff --git a/tools/include/linux/compiler-gcc.h b/tools/include/linux/compiler-gcc.h > index a590a1dfafd9..43d9a46d36f0 100644 > --- a/tools/include/linux/compiler-gcc.h > +++ b/tools/include/linux/compiler-gcc.h > @@ -16,9 +16,7 @@ > # define __fallthrough __attribute__ ((fallthrough)) > #endif > > -#if GCC_VERSION >= 40300 > -# define __compiletime_error(message) __attribute__((error(message))) > -#endif /* GCC_VERSION >= 40300 */ > +#define __compiletime_error(message) __attribute__((error(message))) > > /* &a[0] degrades to a pointer: a different type from an array */ > #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) This part could be applied regardless (it's a missed 4.3 check, yes?) -- Kees Cook