tree 37586c9ecdd7bbc89ce4db07abde3ca32d6a8e1c
parent 4e7f1f9089660aec3b5ab2645ce62777c6f4c6a2
author Joe Thornber <ejt@redhat.com> 1362177950 +0000
committer Alasdair G Kergon <agk@redhat.com> 1362177950 +0000

dm bio prison: pass cell memory in

Change the dm_bio_prison interface so that instead of allocating memory
internally, dm_bio_detain is supplied with a pre-allocated cell each
time it is called.

This enables a subsequent patch to move the allocation of the struct
dm_bio_prison_cell outside the thin target's mapping function so it can
no longer block there.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>