Exporting ioctls from out-of-tree module to userspace

[Anupam Kapoor]

hi,

in the older kernels (anything before the commit id mentioned below),
there is include/Kbuild, where you can do something like this:

header-y += ../../quick-hacks/kernel-modules/mymodule/

and then do a  'make headers_install' from the *source* tree, which
seems to do the right thing.

in newer kernels, due to 10b63956fce7f369cc37fd4d994f09bd5203efe4, you
need to do the same thing in include/uapi/Kbuild...

kind regards
anupam


On Thu, Jul 17, 2014 at 12:27 AM, Daniel Hilst Selli
<danielhilst at gmail.com> wrote:
> I write an out-of-tree module and now want to export its ioctls to
> userspace by installing a header that my modules includes, I was looking
> for how to do it but can't get it..
>
> I was trying header-y from
> https://www.kernel.org/doc/Documentation/kbuild/makefiles.txt but got:
> make[1]: *** No rule to make target 'headers_install'.  Stop.
>
> Here is what I'm trying: https://gist.github.com/gkos/b0bc4e29a3147b0e6d3b
>
> I see on kernel that usually the exported headers go in
> include/uapi/SOMETHING and are declared on include/uapi/Kbuild.. but
> have no idea if this may work for out-of-tree modules, the
> headers_install exists on linux Makefile so the 'No rule to make target
> 'headers_install'' doesn't make sense to me ..
>
> I try follow headers_install target on kernel's Makefile but only got
> frustraded :(
>
> Any idea?
>
> ps: I compiled the module but don't loaded it, so it may have mistakes
>
> Thanks in advance!
> Cheers!
>
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