Christoph, On Sat, Aug 10, 2019 at 4:52 PM Christoph Hellwig <hch@xxxxxx> wrote: > > Hi Masahiro, > > what is the reason that the documentation says mandatory-y should only > be used for uapi headers? Where is it documented? Documentation/kbuild/makefiles.rst section 7.4 describes mandatory-y is essentially used by include/(uapi/)asm-generic/Kbuild include/(uapi/)asm-generic/Kbuild means: include/uapi/asm-generic/Kbuild include/asm-generic/Kbuild -- Best Regards Masahiro Yamada