6437b0b4dd
commit 82b143aeb169b8b55798d7d2063032e1a6ceeeb0 upstream. This reverts commit 0921244f6f4f0d05698b953fe632a99b38907226. It broke CPU hotplugging because it modifies the __cpu_possible_mask after bootup, so that it will be different than nr_cpu_ids, which then effictively breaks the workqueue setup code and triggers crashes when shutting down CPUs at runtime. Guenter was the first who noticed the wrong values in __cpu_possible_mask, since the cpumask Kunit tests were failig. Reverting this commit fixes both issues, but sadly brings back this uncritical runtime warning: register_cpu_capacity_sysctl: too early to get CPU4 device! Signed-off-by: Helge Deller <deller@gmx.de> Reported-by: Guenter Roeck <linux@roeck-us.net> Link: https://lkml.org/lkml/2024/2/4/146 Link: https://lore.kernel.org/lkml/Zb0mbHlIud_bqftx@slm.duckdns.org/t/ Cc: stable@vger.kernel.org # 6.0+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>