On Fri, 2017-09-15 at 19:06 +0900, Damien Le Moal wrote: > Rearrange sd_zbc_setup() to include use_16_for_rw and use_10_for_rw > assignments and move the calculation of sdkp->zone_shift together > with the assignment of the verified zone_blocks value in > sd_zbc_check_zone_size(). Both functions are called from inside block_device_operations.revalidate_disk. Isn't that too late to set use_1[06]_for_rw? Shouldn't both be set just after the slave_alloc callback has been called? Thanks, Bart.