diff options
| author | Ming Lei <tom.leiming@gmail.com> | 2026-04-09 21:30:17 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-04-09 19:10:44 -0600 |
| commit | 365ea7cc62447caac508706b429cdf031cc15a9f (patch) | |
| tree | 073aa6b283332e07cfba16f12200c6c2851dad5b /rust/kernel/gpu/git@git.tavy.me:linux-stable.git | |
| parent | 5e864438e2853ef5112d7905fadcc3877e2be70a (diff) | |
ublk: allow buffer registration before device is started
Before START_DEV, there is no disk, no queue, no I/O dispatch, so
the maple tree can be safely modified under ub->mutex alone without
freezing the queue.
Add ublk_lock_buf_tree()/ublk_unlock_buf_tree() helpers that take
ub->mutex first, then freeze the queue if device is started. This
ordering (mutex -> freeze) is safe because ublk_stop_dev_unlocked()
already holds ub->mutex when calling del_gendisk() which freezes
the queue.
Suggested-by: Caleb Sander Mateos <csander@purestorage.com>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Link: https://patch.msgid.link/20260409133020.3780098-6-tom.leiming@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'rust/kernel/gpu/git@git.tavy.me:linux-stable.git')
0 files changed, 0 insertions, 0 deletions