Am 06.05.20 um 06:52 schrieb Christoph Hellwig: > > No, I mean the series that I actually sent out: > > https://lkml.org/lkml/2020/4/21/66 > https://lkml.org/lkml/2020/4/21/68 > https://lkml.org/lkml/2020/4/21/69 OK, just thought again about your suggestion and also that you have already been talking about a symbol lookup I just have written a prototype that took your first two patches as base, exports the symbol of dasd_biodasdinfo and in ibm.c I do a kallsyms_lookup_name("dasd_biodasdinfo"). So I would not have to define a structure twice or rely on MAJORs. Also we would not have to define an own file operation only for DASD devices. What do you think about this? If you agree I will polish the patches, test them and send them for review.