tree 9851a37565bc5e14d75ad99b7fe0d53b49fb1d7b
parent 4b482044d24f3db2e11607d0a18f64b3a326972d
author Shaohua Li <shli@fb.com> 1444366447 -0700
committer NeilBrown <neilb@suse.com> 1446346109 +1100

raid5: journal disk can't be removed

raid5-cache uses journal disk rdev->bdev, rdev->mddev in several places.
Don't allow journal disk disappear magically. On the other hand, we do
need to update superblock for other disks to bump up ->events, so next
time journal disk will be identified as stale.

Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>