linux-kernel - Re: [PATCH v2 3/7] Revert "arm64: bti: Require clang >= 10.0.1 for in-kernel BTI support"

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Date:   Mon, 31 Aug 2020 21:55:44 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Kees Cook <keescook@...omium.org>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        Sedat Dilek <sedat.dilek@...il.com>,
        Marco Elver <elver@...gle.com>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        clang-built-linux@...glegroups.com,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Will Deacon <will@...nel.org>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/7] Revert "arm64: bti: Require clang >= 10.0.1 for
 in-kernel BTI support"

On Mon, Aug 31, 2020 at 05:23:22PM -0700, Nick Desaulniers wrote:
> This reverts commit b9249cba25a5dce5de87e5404503a5e11832c2dd.
> 
> The minimum supported version of clang is now 10.0.1.
> 
> Suggested-by: Nathan Chancellor <natechancellor@...il.com>
> Signed-off-by: Nick Desaulniers <ndesaulniers@...gle.com>

Reviewed-by: Nathan Chancellor <natechancellor@...il.com>

> ---
>  arch/arm64/Kconfig | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 6d232837cbee..2a70b85b1a61 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -1630,8 +1630,6 @@ config ARM64_BTI_KERNEL
>  	depends on CC_HAS_BRANCH_PROT_PAC_RET_BTI
>  	# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94697
>  	depends on !CC_IS_GCC || GCC_VERSION >= 100100
> -	# https://reviews.llvm.org/rGb8ae3fdfa579dbf366b1bb1cbfdbf8c51db7fa55
> -	depends on !CC_IS_CLANG || CLANG_VERSION >= 100001
>  	depends on !(CC_IS_CLANG && GCOV_KERNEL)
>  	depends on (!FUNCTION_GRAPH_TRACER || DYNAMIC_FTRACE_WITH_REGS)
>  	help
> -- 
> 2.28.0.402.g5ffc5be6b7-goog
>