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Date:   Wed, 2 Jan 2019 13:14:18 +0100
From:   Sedat Dilek <>
Cc:, Thomas Gleixner <>,
        Ingo Molnar <>,
        Ard Biesheuvel <>,
        Peter Zijlstra <>,
        Josh Poimboeuf <>,, Will Deacon <>,
        "David S . Miller" <>,
        Max Filippov <>,,,,,,,,
        Linus Torvalds <>,
        Masahiro Yamada <>
Subject: Re: jump_label: move 'asm goto' support test to Kconfig


I was not aware that CONFIG_JUMP_LABEL Kconfig setting depends on the
support of asm-goto.

Currently, I am doing experiments with clang-7 and a snapshot of
clang-8 on Linux/x86.
These compilers have no asm-goto support.

What is your recommendation for Linux >= v4.20?
I am asking as it is possible to set CONFIG_JUMP_LABEL=y when
compiling with clang - which has no effect.
This is confusing.

Thanks, this patch makes things clearer and protects users from
setting "wrong" in the sense of non-functional settings.

I have tested this against recent Linus tree where kbuild/kconfig Git
pulls were latest commits.

Tested-by: Sedat Dilek <> [ x86 with LLVM/Clang
v7 and v8 (snapshot) ]


- Sedat -

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