Merge branch 'net-avoid-KCSAN-splats'

Eric Dumazet says:

====================
net: avoid KCSAN splats

Often times we use skb_queue_empty() without holding a lock,
meaning that other cpus (or interrupt) can change the queue
under us. This is fine, but we need to properly annotate
the lockless intent to make sure the compiler wont over
optimize things.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>