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Date: Tue, 18 Jan 2011 13:08:45 +0200 From: "Michael S. Tsirkin" <mst@...hat.com> To: Jason Wang <jasowang@...hat.com>, kvm@...r.kernel.org, virtualization@...ts.osdl.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] vhost: rcu annotation fixup 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 <mst@...hat.com> --- 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 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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