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From: Meelis Roos <mroos@linux.ee>
To: Michael Ellerman <mpe@ellerman.id.au>,
	linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: 32-bit poweroc compile failure in v4.19-rc7-166-g7ec21823634d
Date: Mon, 15 Oct 2018 15:20:21 +0300	[thread overview]
Message-ID: <7c9c56d8-df58-eac7-e41e-8d2746f1c0d5@linux.ee> (raw)
In-Reply-To: <87tvlnzegi.fsf@concordia.ellerman.id.au>

>> I tried to test the fix to 32-bit poweroc boot hang but found that current git does not compile on 32bit poweroc at all for me:
> 
> That's GCC 8 I think?

Yes, gcc version 8.2.0 (Debian 8.2.0-7).

> I have seen that but couldn't work out what the hell GCC is thinking.
> 
> I don't think there's an actual bug, the size of the copy is bounded by
> the count parameter, which *doesn't* come from user space, it's hard
> coded.
> 
> I suspect the logic is just to convoluted for GCC.
> 
> We should fix it somehow, but I haven't worked out what's the best option.
> 
> cheers

-- 
Meelis Roos <mroos@linux.ee>

      reply	other threads:[~2018-10-15 12:21 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-13 20:38 32-bit poweroc compile failure in v4.19-rc7-166-g7ec21823634d Meelis Roos
2018-10-15 10:33 ` Michael Ellerman
2018-10-15 12:20   ` Meelis Roos [this message]

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