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IB/mlx4: Micro-optimize mlx4_ib_poll_one()
authorRoland Dreier <rolandd@cisco.com>
Fri, 25 Jan 2008 22:15:34 +0000 (14:15 -0800)
committerRoland Dreier <rolandd@cisco.com>
Fri, 25 Jan 2008 22:15:34 +0000 (14:15 -0800)
commitb3226184af6c13c9d5d38f13f0ef8e03f718bbf7
treee79a895f7c320ada2cf8a1faffb735f9fc098c8atree | snapshot (tar.gz zip)
parente57895d38991036f9ccf193b70fc5ebd5f6e6dc9commit | diff
IB/mlx4: Micro-optimize mlx4_ib_poll_one()

Rather than byte-swapping cqe->g_mlpath_rqpn each time we extract a
field from it, byte-swap it once into a temporary variable.  This
results in smaller, better code -- eg, on 32-bit x86:

add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-5 (-5)
function                                     old     new   delta
mlx4_ib_poll_cq                             1188    1183      -5

Signed-off-by: Roland Dreier <rolandd@cisco.com>
drivers/infiniband/hw/mlx4/cq.c diff | blob | blame | history