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SubjectRe: 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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