When built with rcu checks enabled, vhost triggers bogus warnings as vhost features are read without dev->mutex sometimes. Fixing it properly is not trivial as vhost.h does not know which lockdep classes it will be used under. Disable the warning by stubbing out the check for now.
Signed-off-by: Michael S. Tsirkin <[email protected]> --- drivers/vhost/vhost.h | 4 +--- 1 files changed, 1 insertions(+), 3 deletions(-) diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index 2af44b7..2d03a31 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -173,9 +173,7 @@ static inline int vhost_has_feature(struct vhost_dev *dev, int bit) { unsigned acked_features; - acked_features = - rcu_dereference_index_check(dev->acked_features, - lockdep_is_held(&dev->mutex)); + acked_features = rcu_dereference_index_check(dev->acked_features, 1); return acked_features & (1 << bit); } -- 1.7.3.2.91.g446ac _______________________________________________ Virtualization mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/virtualization
