drbd: use clear_bit_unlock() where appropriate
Some open-coded clear_bit(); smp_mb__after_clear_bit();
should in fact have been smp_mb__before_clear_bit(); clear_bit();
Instead, use clear_bit_unlock() to annotate the intention,
and have it do the right thing.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 592f0c9..c77e51a 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2818,8 +2818,7 @@
put_ldev(mdev);
}
- clear_bit(BITMAP_IO, &mdev->flags);
- smp_mb__after_clear_bit();
+ clear_bit_unlock(BITMAP_IO, &mdev->flags);
wake_up(&mdev->misc_wait);
if (work->done)
