linux-kernel - Re: [PATCH v3 6/6] mips: generate uapi header and system call table files

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Message-ID: <CALxhOnhkQo-qx54E-sbhQG=LiZcJS549sxYpzmGbiMn2YJVhkA@mail.gmail.com>
Date:   Fri, 30 Nov 2018 10:43:36 +0530
From:   Firoz Khan <firoz.khan@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     "open list:RALINK MIPS ARCHITECTURE" <linux-mips@...ux-mips.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        y2038 Mailman List <y2038@...ts.linaro.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Arch <linux-arch@...r.kernel.org>,
        Deepa Dinamani <deepa.kernel@...il.com>,
        Marcin Juszkiewicz <marcin.juszkiewicz@...aro.org>
Subject: Re: [PATCH v3 6/6] mips: generate uapi header and system call table files

Hi Arnd,

Thanks for the email,

On Thu, 29 Nov 2018 at 19:52, Arnd Bergmann <arnd@...db.de> wrote:
>
> On Thu, Nov 29, 2018 at 9:45 AM Firoz Khan <firoz.khan@...aro.org> wrote:
>
> > diff --git a/arch/mips/include/uapi/asm/Kbuild b/arch/mips/include/uapi/asm/Kbuild
> > index 7a4becd..ed4bd03 100644
> > --- a/arch/mips/include/uapi/asm/Kbuild
> > +++ b/arch/mips/include/uapi/asm/Kbuild
> > @@ -1,5 +1,11 @@
> >  # UAPI Header export list
> >  include include/uapi/asm-generic/Kbuild.asm
> >
> > +generated-y += unistd_n32.h
> > +generated-y += unistd_n64.h
> > +generated-y += unistd_o32.h
> > +generated-y += unistd_nr_n32.h
> > +generated-y += unistd_nr_n64.h
> > +generated-y += unistd_nr_o32.h
> >  generic-y += bpf_perf_event.h
> >  generic-y += ipcbuf.h
>
> I'd argue that the unistd_nr_*.h headers should not be in the uapi directory
> but instead be included only from the in-kernel header.

That is also fine. I can update in v4.
Paul, Do you have any comment on this and could you confirm user
space doesn't need this macros - __NR_N32/N64/O32_Linux,
__NR_N32/N64/O32_Linux_syscalls ?

>
>
> > diff --git a/arch/mips/kernel/scall64-n64.S b/arch/mips/kernel/scall64-n64.S
> > new file mode 100644
> > index 0000000..402a085
> > --- /dev/null
> > +++ b/arch/mips/kernel/scall64-n64.S
> > @@ -0,0 +1,117 @@
> > +/*
> > + * This file is subject to the terms and conditions of the GNU General Public
> > + * License.  See the file "COPYING" in the main directory of this archive
> > + * for more details.
> > + *
> > + * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02 by Ralf Baechle
> > + * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
> > + * Copyright (C) 2001 MIPS Technologies, Inc.
> > + */
> > +#include <linux/errno.h>
> > +#include <asm/asm.h>
> > +#include <asm/asmmacro.h>
> > +#include <asm/irqflags.h>
>
> It looks like you change and rename this file at the same time.
> Generally speaking, I would not do that in one patch. Either
> leave the slightly inconsistent name unchanged, or rename
> it in a separate patch.

Ah, you catch this one.I thought it will go with out notice.
Ok, I create one more patch in my v4.

Paul, FYI, you asked me to convert 64 to n64. Here I'm changing file
name - scall64-n64.S (previously it was scall64-64.S) also.

Thanks
Firoz


>
>          Arnd