[dpdk-stable] please help backporting some patches to LTS release 17.11.5

[yoursunny]

Hi Yongseok

f49d7e9a9  Junxiao Shi      cryptodev: fix pool element size for undefined
> operation
>

The bug fixed by my commit is related to asymmetric crypto. That feature is
not present in DPDK 17.11 branch.

Yours, Junxiao

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