selftests: xsk: Remove sync_mutex_tx and atomic var
Although thread_common_ops() are called in both Tx and Rx threads,
testapp_validate() will not spawn Tx thread until Rx thread signals that
it has finished its initialization via condition variable.
Therefore, locking in thread_common_ops is not needed and furthermore Tx
thread does not have to spin on atomic variable.
Note that this simplification wouldn't be possible if there would still
be a common worker thread.
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210329224316.17793-13-maciej.fijalkowski@intel.com
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