[Bug 253461] LinuxKPI: [AMD/ATI] RV730 PRO [Radeon HD 4650] crashes kernel

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 09 Jan 2022 22:39:45 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253461

--- Comment #7 from Vladimir Kondratyev <wulf@freebsd.org> ---
(In reply to Bill Paul from comment #3)

The spin_unlock/spin_lock pair is FreeBSD addition introduced in this commit:
https://github.com/FreeBSDDesktop/kms-drm/commit/81fee07842909530e5ef02d43076a92b22180b48

It is accidentally mostly reverted before 5.4 in commit
20a3e51a54f45df76f82bc381d6375e72021f1a1

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