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Commit 6c6c7951 authored by Lars Ellenberg's avatar Lars Ellenberg Committed by Philipp Reisner
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fix in-kernel configuration serialization 



this is uncritical, as we still also serialize in userland,
but to correctly serialize on the CONFIG_PENDING bit,
it must be wait_event(state_wait, \!test_and_set_bit)

Signed-off-by: default avatarPhilipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: default avatarLars Ellenberg <lars.ellenberg@linbit.com>
parent 32a87c01

drivers/block/drbd/drbd_nl.c

+1 −1
Original line number Diff line number Diff line
@@ -733,7 +733,7 @@ void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_seg_s) __mu 
 */

static void drbd_reconfig_start(struct drbd_conf *mdev)

{

	wait_event(mdev->state_wait, test_and_set_bit(CONFIG_PENDING, &mdev->flags));

	wait_event(mdev->state_wait, !test_and_set_bit(CONFIG_PENDING, &mdev->flags));

	wait_event(mdev->state_wait, !test_bit(DEVICE_DYING, &mdev->flags));

	drbd_thread_start(&mdev->worker);

}