Hello, The 1st patch is one prep patch. The 2nd one fixes lockdep warning triggered by dependency between q->sysfs_lock and cpuhotplug_lock. Ming Lei (2): blk-mq: register cpuhp callback after hctx is added to xarray table blk-mq: move cpuhp callback registering out of q->sysfs_lock block/blk-mq.c | 108 ++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 94 insertions(+), 14 deletions(-) -- 2.47.0