common/ublk: update io_uring setting during the tests

Call the common functions _io_uring_enable/_io_uring_restore to ensure
that io_uring is enabled during ublk test runs.

Link: #153
Signed-off-by: Yi Zhang <[email protected]>
[Shin'ichiro: squashed the following fix into this commit]
Signed-off-by: Shin'ichiro Kawasaki <[email protected]>

common/ublk

@@ -30,6 +30,8 @@ _get_ublk_daemon_pid() {
 }
 
 _init_ublk() {
+	_io_uring_enable
+
 	_remove_ublk_devices > /dev/null 2>&1
 
 	modprobe -rq ublk_drv
@@ -45,4 +47,5 @@ _exit_ublk() {
 	_remove_ublk_devices
 	udevadm settle
 	modprobe -r -q ublk_drv
+	_io_uring_restore
 }