Re: [PATCH v2 6/9] linux-user: Split safe-syscall macro into its own header

[Peter Maydell <peter.maydell@linaro.org>]

On Sun, 12 Sept 2021 at 17:23, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> On 9/8/21 8:44 AM, Peter Maydell wrote:
> > Split the safe-syscall macro from qemu.h into a new safe-syscall.h.
> >
> > Signed-off-by: Peter Maydell<peter.maydell@linaro.org>
> > Reviewed-by: Philippe Mathieu-Daudé<f4bug@amsat.org>
> > ---
> >   linux-user/qemu.h         | 135 ---------------------------------
> >   linux-user/safe-syscall.h | 154 ++++++++++++++++++++++++++++++++++++++
> >   linux-user/syscall.c      |   1 +
> >   3 files changed, 155 insertions(+), 135 deletions(-)
> >   create mode 100644 linux-user/safe-syscall.h
>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
>
>
> > +#else
> > +
> > +/*
> > + * Fallback for architectures which don't yet provide a safe-syscall assembly
> > + * fragment; note that this is racy!
> > + * This should go away when all host architectures have been updated.
> > + */
> > +#define safe_syscall syscall
>
> All native tcg hosts have been updated.  All that is left are those for which we fall back
> to tci.  At what point do we drop the fallback and simply make this a build error?

We should probably do that now, or at least once this cleanup has got into
master...

-- PMM