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    Subject[PATCH] kbuild: disable header exports for UML in a straightforward way
    Date
    Previously 'make ARCH=um headers' stopped because of missing
    arch/um/include/uapi/asm/Kbuild.

    The error is not shown since commit ed102bf2afed ("um: Fix W=1
    missing-include-dirs warnings") because UML got
    arch/um/include/uapi/asm/Kbuild.

    Hard-code the unsupported architecture, so it works like before.

    Fixes: ed102bf2afed ("um: Fix W=1 missing-include-dirs warnings")
    Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
    ---

    Makefile | 3 +--
    1 file changed, 1 insertion(+), 2 deletions(-)

    diff --git a/Makefile b/Makefile
    index 9d40255d1557..8d2047a4de9b 100644
    --- a/Makefile
    +++ b/Makefile
    @@ -1304,8 +1304,7 @@ hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj

    PHONY += headers
    headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
    - $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
    - $(error Headers not exportable for the $(SRCARCH) architecture))
    + $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML))
    $(Q)$(MAKE) $(hdr-inst)=include/uapi
    $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi

    --
    2.34.1
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