On Thu, Jun 15, 2017 at 02:12:58PM +0200, Linus Walleij wrote: > Currently the RPMB partition spawns a separate block device > named /dev/mmcblkNrpmb for each device with an RPMB partition, > including the creation of a block queue with its own kernel > thread and all overhead associated with this. On the Ux500 > HREFv60 platform, for example, the two eMMCs means that two > block queues with separate threads are created for no use > whatsoever. Yikes! What an amazingly stupid design decision. > This patch tries to amend the situation using the following > strategy: > > - Stop creating a block device for the RPMB partition/area > > - Instead create a custom, dynamic character device with > the same name. > > - Make this new character device support exactly the same > set of ioctl()s as the old block device. > > - Wrap the requests back to the same ioctl() handlers, but > issue them on the block queue of the main partition/area, > i.e. /dev/mmcblkN Is it really worth to add all this code to work around the issue? We could still keep the block device around and stub out anything not needed. > Tomas Winkler <tomas.winkler@xxxxxxxxx> > Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx> I think some tag is missing before Tomas' name.
