linux-kernel - Re: remove the last set_fs() in common code, and remove it for x86 and powerpc v3

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Message-ID: <20200903143003.GA17260@lst.de>
Date:   Thu, 3 Sep 2020 16:30:03 +0200
From:   Christoph Hellwig <hch@....de>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     Christoph Hellwig <hch@....de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Michael Ellerman <mpe@...erman.id.au>, x86@...nel.org,
        Alexey Dobriyan <adobriyan@...il.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-arch@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: remove the last set_fs() in common code, and remove it for x86
 and powerpc v3

On Thu, Sep 03, 2020 at 03:28:03PM +0100, Al Viro wrote:
> On Thu, Sep 03, 2020 at 04:22:28PM +0200, Christoph Hellwig wrote:
> 
> > Besides x86 and powerpc I plan to eventually convert all other
> > architectures, although this will be a slow process, starting with the
> > easier ones once the infrastructure is merged.  The process to convert
> > architectures is roughtly:
> > 
> >  (1) ensure there is no set_fs(KERNEL_DS) left in arch specific code
> >  (2) implement __get_kernel_nofault and __put_kernel_nofault
> >  (3) remove the arch specific address limitation functionality
> 
> The one to really watch out for is sparc; I have something in that
> direction, will resurrect as soon as I'm done with eventpoll analysis...
> 
> I can live with this series; do you want that in vfs.git#for-next?

Either that or a separate tree is fine with me.  It would be good to
eventually have a non-rebased stable tree so that other arch trees
can work from it, though.