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

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Message-ID: <87ttdi6hzd.fsf@mail.lhotse>
Date: Fri, 11 Oct 2024 21:39:50 +1100
From: Michael Ellerman <michael@...erman.id.au>
To: "Jason A. Donenfeld" <Jason@...c4.com>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>, 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()

"Jason A. Donenfeld" <Jason@...c4.com> writes:
> 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.

Ack. It was too late for rc2, and I'm naturally cautious, so I decided
these would go into next.

We can handle any merge conflicts with a topic branch.

cheers