linux-kernel - Re: [GIT PULL] kbuild changes for v4.9-rc1

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Date:   Tue, 18 Oct 2016 12:34:18 +1100
From:   Nicholas Piggin <npiggin@...il.com>
To:     Adam Borowski <kilobyte@...band.pl>
Cc:     Mathieu OTHACEHE <m.othacehe@...il.com>,
        Omar Sandoval <osandov@...ndov.com>,
        Michal Marek <mmarek@...e.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        adobriyan@...il.com, sfr@...b.auug.org.au, viro@...iv.linux.org.uk,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org
Subject: Re: [GIT PULL] kbuild changes for v4.9-rc1

Hi Adam,

Thanks, this is looking good. powerpc will be able to use the generic
header.

On Tue, 18 Oct 2016 02:16:26 +0200
Adam Borowski <kilobyte@...band.pl> wrote:

> On Mon, Oct 17, 2016 at 02:22:34PM +0200, Mathieu OTHACEHE wrote:
> > > +#include <asm/uaccess.h>
> > > +#include <asm/uaccess.h>  
> > 
> > Included twice.  
> 
> D'oh!
> 
> > > +#include <asm/string.h>
> > > +#include <asm/page.h>
> > > +#include <asm/checksum.h>
> > > +
> > > +#include <asm-generic/asm-prototypes.h>
> > > +
> > > +#include <asm/page.h>
> > > +#include <asm/pgtable.h>
> > > +#include <asm/special_insns.h>
> > > +#include <asm/preempt.h>  
> > 
> > No <asm/arch_hweight.h> for __sw_hweight32 and __sw_hweight64 ?   
> 
> diff --git a/include/asm-generic/asm-prototypes.h b/include/asm-generic/asm-prototypes.h
> new file mode 100644
> index 0000000..df13637
> --- /dev/null
> +++ b/include/asm-generic/asm-prototypes.h
> @@ -0,0 +1,7 @@
> +#include <linux/bitops.h>
> 
> ... which has these.
> 
> Alexey Dobriyan <adobriyan@...il.com> wrote:
> } bitops.h is wrong header as well.
> } Why do you need bitops for bunch of function prototypes?
> 
> Unless you guys prefer using low-level headers only, that is.

Well you can't use asm/arch_hweight.h in a generic header of course.
I would suggest just including linux/ variants where practical for
the asm-generic/asm-prototypes.h header.

We should probably just bring all these arch patches through the
kbuild tree.

I'm sorry for the breakage: I didn't realize it broke the build with
some configs, otherwise I would have given Michal a heads up before
his pull request, and worked to get this stuff in first.

Thanks,
Nick