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struct tcp_fastopen_context has a field named tfm, which is a pointer to a crypto_cipher structure. It currently has a __rcu annotation, which is not needed at all. tcp_fastopen_ctx is the pointer fetched by rcu_dereference(), but once we have a pointer to current tcp_fastopen_context, we do not use/need rcu_dereference() to access tfm. This fixes a lot of sparse errors like the following : net/ipv4/tcp_fastopen.c:21:31: warning: incorrect type in argument 1 (different address spaces) net/ipv4/tcp_fastopen.c:21:31: expected struct crypto_cipher *tfm net/ipv4/tcp_fastopen.c:21:31: got struct crypto_cipher [noderef] <asn:4>*tfm Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Jerry Chu <hkchu@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>