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From:   Sami Tolvanen <samitolvanen@google.com>
Date:   Fri, 25 Oct 2019 12:24:33 -0700
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Subject: Re: [PATCH v2 16/17] arm64: disable SCS for hypervisor code
To:     Masahiro Yamada <yamada.masahiro@socionext.com>
Cc:     Will Deacon <will@kernel.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        Dave Martin <Dave.Martin@arm.com>,
        Kees Cook <keescook@chromium.org>,
        Laura Abbott <labbott@redhat.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Jann Horn <jannh@google.com>,
        Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
        clang-built-linux <clang-built-linux@googlegroups.com>,
        Kernel Hardening <kernel-hardening@lists.openwall.com>,
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On Thu, Oct 24, 2019 at 6:31 PM Masahiro Yamada
<yamada.masahiro@socionext.com> wrote:
> $(subst ... ) is not the correct use here.
>
> It works like sed,   s/$(CC_CFLAGS_SCS)//
> instead of matching by word.
>
>
>
>
> KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS))
>
> is more correct, and simpler.

Thanks, I will change this in v3.

Sami