tree b4fbfed60c0614d97a91638483058a133ddfcbf4
parent c41d4ac40df0d01bf9c383ff28f194d1df2d4fd9
author NeilBrown <neilb@suse.de> 1275385045 +1000
committer NeilBrown <neilb@suse.de> 1280112746 +1000

md/raid5: ensure we create a unique name for kmem_cache when mddev has no gendisk

We will shortly allow md devices with no gendisk (they are attached to
a dm-target instead).  That will cause mdname() to return 'mdX'.
There is one place where mdname really needs to be unique: when
creating the name for a slab cache.
So in that case, if there is no gendisk, you the address of the mddev
formatted in HEX to provide a unique name.

Signed-off-by: NeilBrown <neilb@suse.de>