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Date: Tue, 23 Sep 2014 21:59:32 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: ashutosh dixit <ashutosh.dixit@intel.com>
Cc: Peter Foley <pefoley2@pefoley.com>, Randy Dunlap <rdunlap@infradead.org>,
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        "Rao\, Nikhil" <nikhil.rao@intel.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: Re: [PATCH linux-next] Documentation: mic: mpssd: Disable mpssd
 builds for kernels < 3.13
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On Tue, 23 Sep 2014 21:51:09 -0700 ashutosh dixit <ashutosh.dixit@intel.com> wrote:

> On Tue, Sep 23 2014 at 05:58:19 PM, Peter Foley <pefoley2@pefoley.com> wrote:
> > On Tue, Sep 23, 2014 at 8:51 PM, Andrew Morton
> > <akpm@linux-foundation.org> wrote:
> >> Can't we just fix the Makefiles?  Cook up a rule which makes
> >> headers_install (if needed) before building Documentation/?
> >
> > Currently, the ordering is enforced by
> > http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/tree/Makefile#n946
> > I'll take a look at making Documentation/ depend on headers_install.
> >
> I would think it is preferable to keep the 'make headers_install' and
> 'make Documentation/' steps separate, as they currently are, so that
> only the people who need to upgrade system headers do that, rather than
> forcing people to upgrade system headers each time something in
> Documentation/ is recompiled and moreover doing that compile/install as
> root.

headers_install installs into ./usr/include and ./include.  It's local
to the kernel build tree.