netlink: Call cb->done from a worker thread
The cb->done interface expects to be called in process context. This was broken by the netlink RCU conversion. This patch fixes it by adding a worker struct to make the cb->done call where necessary. Fixes: 21e4902a ("netlink: Lockless lookup with RCU grace...") Reported-by: NSubash Abhinov Kasiviswanathan <subashab@codeaurora.org> Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au> Acked-by: NCong Wang <xiyou.wangcong@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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