tree 3f47042bfc3d9fec74addd06837e37ae3c91eb5d
parent 5207f3996338e1db71363fe381c81aaf1e54e4e3
author Jason Baron <jbaron@akamai.com> 1485312581 -0500
committer David S. Miller <davem@davemloft.net> 1485368616 -0500

tcp: correct memory barrier usage in tcp_check_space()

sock_reset_flag() maps to __clear_bit() not the atomic version clear_bit().
Thus, we need smp_mb(), smp_mb__after_atomic() is not sufficient.

Fixes: 3c7151275c0c ("tcp: add memory barriers to write space paths")
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Jason Baron <jbaron@akamai.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Reported-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>