[BUG] dm-crypt broken after 2632e2521769 ("arm64: fpsimd: Implement lazy restore for kernel mode FPSIMD")

[Mark Brown]

On Tue, May 21, 2024 at 07:34:45PM +0100, Will Deacon wrote:

> I've already reverted 2632e2521769 ("arm64: fpsimd: Implement lazy
> restore for kernel mode FPSIMD"), so it sounds like I should revert
> aefbab8e77eb ("arm64: fpsimd: Preserve/restore kernel mode NEON at
> context switch") as well while we work to reproduce the issue.

For paranoia I'd be tempted to revert 9b19700e623f9 ("arm64: fpsimd:
Drop unneeded 'busy' flag") as well since we're not sure where exactly
the issue is, that'd drop the entire series.  It's hopefully excessive
but the exact bisection doesn't seem 100% clear and obviously we missed
something.
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