On Thu, Feb 11, 2010 at 7:55 AM, Arnd Bergmann [off-list ref] wrote:

The RCU usage in the original code was broken because
there are cases where we possibly sleep with rcu_read_lock
held. As a fix, change the macvtap_file_get_queue to
get a reference on the socket and the netdev instead of
taking the full rcu_read_lock.

Also, change macvtap_file_get_queue failure case to
not require a subsequent macvtap_file_put_queue, as
pointed out by Ed Swierk.

Works for me. Thanks.

Acked-by: Ed Swierk <redacted>