linux/Documentation/ABI/obsolete/sysfs-firmware-acpi
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   1What:           /sys/firmware/acpi/hotplug/force_remove
   2Date:           Mar 2017
   3Contact:        Rafael J. Wysocki <rafael.j.wysocki@intel.com>
   4Description:
   5                Since the force_remove is inherently broken and dangerous to
   6                use for some hotplugable resources like memory (because ignoring
   7                the offline failure might lead to memory corruption and crashes)
   8                enabling this knob is not safe and thus unsupported.
   9