From: Jason Gunthorpe <jgg@nvidia.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: Uros Bizjak <ubizjak@gmail.com>,
Alejandro Jimenez <alejandro.j.jimenez@oracle.com>,
linux-kernel@vger.kernel.org
Subject: Re: Help with atomic fallback
Date: Tue, 3 Dec 2024 10:49:55 -0400 [thread overview]
Message-ID: <20241203144955.GL1253388@nvidia.com> (raw)
In-Reply-To: <Z08YT5nD6uHC-PSm@J2N7QTR9R3.cambridge.arm.com>
On Tue, Dec 03, 2024 at 02:40:15PM +0000, Mark Rutland wrote:
> > Which expands to:
> >
> > old = ({ typeof(ptep) __ai_ptr = (ptep); instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); raw_cmpxchg64_relaxed_not_implemented(); });
> >
> > And no compiler error. Presumably it doesn't link, but my compiler
> > ICE's before it gets that far.
>
> I don't think that "my compiler ICE's" implies "compiles OK".
Well, it ICE's later. I'm using the 0-day instructions with
make.cross
during RTL pass: mach
../drivers/iommu/of_iommu.c: In function 'of_iommu_configure':
../drivers/iommu/of_iommu.c:163:1: internal compiler error: in arc_ifcvt, at config/arc/arc.cc:9703
163 | }
| ^
> When building io-pgtable-arm.c for ARC (with your tree!) I see the same error:
Okay, I think I see it too, it got lost in all the other noise :\
Jason
prev parent reply other threads:[~2024-12-03 14:50 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-03 0:38 Help with atomic fallback Jason Gunthorpe
2024-12-03 8:06 ` Uros Bizjak
2024-12-03 12:26 ` Mark Rutland
2024-12-03 13:08 ` Jason Gunthorpe
2024-12-03 14:40 ` Mark Rutland
2024-12-03 14:49 ` Jason Gunthorpe [this message]
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