Re: [RFC v7 12/21] um: nommu: system call interface and application API

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On Thu, 2020-10-08 at 22:03 +0300, Octavian Purdila wrote:
> On Wed, Oct 7, 2020 at 10:05 PM Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote:
> > On Tue, 2020-10-06 at 18:44 +0900, Hajime Tazaki wrote:
> > > +++ b/arch/um/nommu/include/uapi/asm/syscalls.h
> > > @@ -0,0 +1,287 @@
> > > +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> > 
> > That doesn't really make sense - if you use LKL you're linking Linux, so
> > you can't use this "WITH Linux-syscall-note"?
> > 
> > > +#ifndef __UM_NOMMU_UAPI_SYSCALLS_H
> > > +#define __UM_NOMMU_UAPI_SYSCALLS_H
> > 
> > [snip]
> > 
> > This file really worries me, it includes half the world and (re)defines
> > the other half ... How is this ever going to be maintained?
> > 
> 
> There are not that many definitions here, just the ones that were
> never defined in uapi headers. And, AFAIK, new code that exposes
> structures and data types should always go  into uapi headers and not
> directly in glibc, etc. So once we fix the old stuff, it should be
> fine?

Yeah, not really sure. Not all of this is really old stuff, e.g. keyring
things were here I noticed.

But since it's userspace API I guess the changes of it breaking are
fairly small anyway, so maybe I just shouldn't worry about it :)

johannes




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