linux-kernel - Re: [PATCH] m68k: Wire up clone3() syscall

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Message-ID: <20191126144121.kzkujr27ga36gqnf@wittgenstein>
Date:   Tue, 26 Nov 2019 15:41:22 +0100
From:   Christian Brauner <christian.brauner@...ntu.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Kars de Jong <jongk@...ux-m68k.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux/m68k <linux-m68k@...r.kernel.org>
Subject: Re: [PATCH] m68k: Wire up clone3() syscall

On Mon, Nov 25, 2019 at 10:12:25AM +0100, Geert Uytterhoeven wrote:
> Hi Kars,
> 
> On Sun, Nov 24, 2019 at 8:52 PM Kars de Jong <jongk@...ux-m68k.org> wrote:
> > Wire up the clone3() syscall for m68k. The special entry point is done in
> > assembler as was done for clone() as well. This is needed because all
> > registers need to be saved. The C wrapper then calls the generic
> > sys_clone3() with the correct arguments.
> >
> > Tested on A1200 using the simple test program from:
> >
> >   https://lore.kernel.org/lkml/20190716130631.tohj4ub54md25dys@brauner.io/

Please note that we now have a growing test-suite for the clone3()
syscall under
tools/testing/selftests/clone3/*

You can test on a suitable kernel with

make TARGETS=clone3 kselftest

> >
> > Cc: linux-m68k@...r.kernel.org
> > Signed-off-by: Kars de Jong <jongk@...ux-m68k.org>
> 
> Thanks a lot!
> Works fine on ARAnyM, too.
> 
> Looks good to me, but I'll wait a bit before applying, so the syscall experts
> can chime in, if needed.

Otherwise this looks good to me.
Thanks for moving this forward. One day we'll be able to remove
ARCH_WANT_SYS_CLONE3 completely. :)

	Christian