s390/qeth: cache max number of available buffer elements
authorJulian Wiedmann <jwi@linux.ibm.com>
Thu, 25 Apr 2019 16:25:59 +0000 (18:25 +0200)
committerDavid S. Miller <davem@davemloft.net>
Fri, 26 Apr 2019 15:14:06 +0000 (11:14 -0400)
commit4e26c5fe552e5f0d9e3abcea48cd311af232bed9
tree8e1cba39ad9346cc936c485515a61a4aada56800
parent7b579ce57ecf73856a26173b04ab6053798c8e2a
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>
drivers/s390/net/qeth_core.h
drivers/s390/net/qeth_core_main.c
drivers/s390/net/qeth_l2_main.c