| commit | 7c8a3679e3d8e9d92d58f282161760a0e247df97 | [log] [tgz] |
|---|---|---|
| author | Tomoki Sekiyama <tomoki.sekiyama@hds.com> | Tue Oct 15 16:42:19 2013 -0600 |
| committer | Jens Axboe <axboe@kernel.dk> | Fri Nov 08 09:00:13 2013 -0700 |
| tree | 220802e0b80df5b3191359cf09effcfae84718a5 | |
| parent | eb1c160b22655fd4ec44be732d6594fd1b1e44f4 [diff] |
elevator: acquire q->sysfs_lock in elevator_change() Add locking of q->sysfs_lock into elevator_change() (an exported function) to ensure it is held to protect q->elevator from elevator_init(), even if elevator_change() is called from non-sysfs paths. sysfs path (elv_iosched_store) uses __elevator_change(), non-locking version, as the lock is already taken by elv_iosched_store(). Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama@hds.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>