Hi Alexander, On 01/01/2025 at 17:39:15 +02, Alexander Usyskin <alexander.usyskin@xxxxxxxxx> wrote: > Create master device without partition when > CONFIG_MTD_PARTITIONED_MASTER flag is unset. I don't think you took into consideration my remarks regarding the fact that you would break userspace. If you enable the master, you no longer have the same device numbering in userspace. I know people should not care about these numbers, but in practice they do. If I'm wrong, please be a little more verbose about why :) Thanks, Miquèl