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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BAT SKL] lockdep splat"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93294#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BAT SKL] lockdep splat"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93294">bug 93294</a>
from <span class="vcard"><a class="email" href="mailto:tomix.p.sarvela@intel.com" title="Tomi Sarvela <tomix.p.sarvela@intel.com>"> <span class="fn">Tomi Sarvela</span></a>
</span></b>
<pre>Changing HOTPLUG_CPU and ACPI_HOTPLUG_CPU is not enough to keep this lock out
of code. Looking at Kconfig: (disabling PM is counterproductive to testing PM
functionality with IGT)
config HOTPLUG_CPU
bool "Support for hot-pluggable CPUs"
depends on SMP
---help---
Say Y here to allow turning CPUs off and on. CPUs can be
controlled through /sys/devices/system/cpu.
( Note: power management support will enable this option
automatically on SMP systems. )
Say N if you want to disable CPU hotplug.</pre>
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