[PATCH] Revert "arm64: Enable perf events based hard lockup detector"

[Catalin Marinas]

On Tue, 12 Jan 2021 22:18:55 +0000, Will Deacon wrote:
> This reverts commit 367c820ef08082e68df8a3bc12e62393af21e4b5.
> 
> lockup_detector_init() makes heavy use of per-cpu variables and must be
> called with preemption disabled. Usually, it's handled early during boot
> in kernel_ionit_freeable(), before SMP has been initialised.
> 
> Since we do not know whether or not our PMU interrupt can be signalled
> as an NMI until considerably later in the boot process, the Arm PMU
> driver attempts to re-initialise the lockup detector off the back of a
> device_initcall(). Unfortunately, this is called from preemptible
> context and results in the following splat:
> 
> [...]

Applied to arm64 (for-next/fixes), thanks!

[1/1] Revert "arm64: Enable perf events based hard lockup detector"
      https://git.kernel.org/arm64/c/b90d72a6bfdb

-- 
Catalin