s390/qeth: cache max number of available buffer elements
The QETH_MAX_BUFFER_ELEMENTS() macro effectively returns a constant value. To avoid some redundant pointer chasing and computations in the xmit hot path, cache this value in the queue struct. Take this as opportunity to shrink some of the queue struct's fields to their appropriate value range, slightly reducing its total size. Signed-off-by:Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
7b579ce5
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