diff options
Diffstat (limited to 'drivers/block/elevator.c')
| -rw-r--r-- | drivers/block/elevator.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/block/elevator.c b/drivers/block/elevator.c index 55621d5c5774..58e881bfd189 100644 --- a/drivers/block/elevator.c +++ b/drivers/block/elevator.c @@ -642,6 +642,27 @@ EXPORT_SYMBOL_GPL(elv_register); void elv_unregister(struct elevator_type *e) { + struct task_struct *g, *p; + + /* + * Iterate every thread in the process to remove the io contexts. + */ + read_lock(&tasklist_lock); + do_each_thread(g, p) { + struct io_context *ioc = p->io_context; + if (ioc && ioc->cic) { + ioc->cic->exit(ioc->cic); + ioc->cic->dtor(ioc->cic); + ioc->cic = NULL; + } + if (ioc && ioc->aic) { + ioc->aic->exit(ioc->aic); + ioc->aic->dtor(ioc->aic); + ioc->aic = NULL; + } + } while_each_thread(g, p); + read_unlock(&tasklist_lock); + spin_lock_irq(&elv_list_lock); list_del_init(&e->list); spin_unlock_irq(&elv_list_lock); |