linux-kernel - Re: [PATCH V9 01/21] csky: Build infrastructure

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Date:   Wed, 24 Oct 2018 23:53:05 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Guo Ren <ren_guo@...ky.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>
Subject: Re: [PATCH V9 01/21] csky: Build infrastructure

On Tue, Oct 23, 2018 at 1:08 AM Guo Ren <ren_guo@...ky.com> wrote:
>
> Hi Arnd,
>
> Could you help me review the patch, seems the patch is skipped.
> ref: https://lkml.org/lkml/2018/10/16/224

Ah right, I missed that. I think I originally had some thoughts on it but
didn't immediately comment and then forgot about it. It's basically
ok, so

Acked-by: Arnd Bergmann <arnd@...db.de>

but please have a look below for a follow-up patch:

> > diff --git a/arch/csky/include/asm/Kbuild b/arch/csky/include/asm/Kbuild
> > new file mode 100644
> > index 0000000..014eb57
> > --- /dev/null
> > +++ b/arch/csky/include/asm/Kbuild
> > @@ -0,0 +1,72 @@
> > +generic-y += asm-offsets.h
> > +generic-y += bitsperlong.h
> > +generic-y += bugs.h
> > +generic-y += clkdev.h
> > +generic-y += compat.h
> > +generic-y += current.h
> > +generic-y += delay.h
> > +generic-y += device.h
> > +generic-y += div64.h
...
> > +generic-y += errno.h
...
> > +generic-y += ioctl.h
> > +generic-y += ioctls.h

A number of the header files that are marked as generic-y in
asm/Kbuild are also marked the same way in uapi/asm/Kbuild.
I think this is a mistake, since we only need one of the two
for each header.

When both exist, we just take the one from asm/, but then we install
the uapi/asm/ version in the 'make headers_install' stage, and they
both have the same contents, so I think you only need the uapi/asm/
version here.

> > diff --git a/arch/csky/include/uapi/asm/Kbuild b/arch/csky/include/uapi/asm/Kbuild
> > new file mode 100644
> > index 0000000..b65252b
> > --- /dev/null
> > +++ b/arch/csky/include/uapi/asm/Kbuild
> > @@ -0,0 +1,33 @@
> > +include include/uapi/asm-generic/Kbuild.asm
> > +
> > +header-y += cachectl.h
> > +header-y += stat.h

It also seems that the second statement here (for stat.h) is from
an older version, since that header no longer exists, at least if
I'm reading your patches correctly.

         Arnd