linux-kernel - Re: [PATCH 2/2] powerpc/vdso: Implement __arch_get_vdso_rng

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Message-ID: <ZwQMPmfG5zDGz1Wr@zx2c4.com>
Date: Mon, 7 Oct 2024 18:28:46 +0200
From: "Jason A. Donenfeld" <Jason@...c4.com>
To: Michael Ellerman <michael@...erman.id.au>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>, mpe@...erman.id.au,
	Nicholas Piggin <npiggin@...il.com>,
	Naveen N Rao <naveen@...nel.org>, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 2/2] powerpc/vdso: Implement __arch_get_vdso_rng_data()

On Fri, Oct 04, 2024 at 04:03:34PM +0200, Jason A. Donenfeld wrote:
> On Fri, Oct 04, 2024 at 08:52:40PM +1000, Michael Ellerman wrote:
> > 
> > 
> > On October 4, 2024 2:33:54 AM GMT+10:00, "Jason A. Donenfeld" <Jason@...c4.com> wrote:
> > >Hey Christophe, Michael,
> > >
> > >This series actually looks pretty okay to me. I realize ThomasW is
> > >working on more generic cleanups that might obliterate the need for
> > >this, and that may or may not wind up in 6.13. But, I was thinking, this
> > >seems like a good correct thing to do, and to do it now for 6.12, maybe
> > >as a fix through the powerpc tree. Then ThomasW can base his work atop
> > >this, which might wind up including the nice lr optimizations you've
> > >made. And then also if ThomasW's work doesn't land or gets reverted or
> > >whatever, at least we'll have this in tree for 6.12.
> > >
> > >Michael - what do you think of that? Worth taking these two patches into
> > >your fixes?
> > 
> > I agree the series looks good. But they're not fixes by my reading, so I'd be inclined to put them in next for v6.13?
> 
> They're "close enough" to fixes. The get_realdatapage stuff is super
> wonky and weird and it's quite good Christophe has gotten rid of it.
> Returning NULL from the generic accesor function never really sat right
> and looks buggy even if it does work. But more to the point, given the
> other scheduled churn for 6.13, it's going to be a tree-clashing
> nightmare to get this in later. And this Sunday is rc2 only, so why not.

Bumping to top of the box.

Jason