This patch only reserves two CPU hotplug states for block/mq so the block tree can apply the conversion patches. Signed-off-by: Sebastian Andrzej Siewior Cc: Peter Zijlstra Cc: Jens Axboe Cc: rt@linutronix.de Signed-off-by: Thomas Gleixner --- include/linux/cpuhotplug.h | 2 ++ 1 file changed, 2 insertions(+) --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h @@ -14,6 +14,7 @@ enum cpuhp_state { CPUHP_PERF_SUPERH, CPUHP_X86_HPET_DEAD, CPUHP_X86_APB_DEAD, + CPUHP_BLK_MQ_DEAD, CPUHP_WORKQUEUE_PREP, CPUHP_POWER_NUMA_PREPARE, CPUHP_HRTIMERS_PREPARE, @@ -22,6 +23,7 @@ enum cpuhp_state { CPUHP_SMPCFD_PREPARE, CPUHP_RCUTREE_PREP, CPUHP_NOTIFY_PREPARE, + CPUHP_BLK_MQ_PREPARE, CPUHP_TIMERS_DEAD, CPUHP_BRINGUP_CPU, CPUHP_AP_IDLE_DEAD,