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author | Roland Dreier <rolandd@cisco.com> | 2008-11-28 21:55:42 -0800 |
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committer | David S. Miller <davem@davemloft.net> | 2008-11-28 21:55:42 -0800 |
commit | c5419e6f054c877339f754e02c3b1dafd88cd96c (patch) | |
tree | 23f31f5387304a49dc768b503356671523611c86 /drivers/isdn | |
parent | f95be1806fde884c1655237d49a7e5f82e4a935f (diff) | |
download | linux-c5419e6f054c877339f754e02c3b1dafd88cd96c.tar.bz2 |
cxgb3: Fix sparse warning and micro-optimize is_pure_response()
The function is_pure_response() does "ntohl(var) & const" and then
essentially just tests whether the result is 0 or not; this can be done
more efficiently by computing "var & htonl(const)" instead and doing the
byte swap at compile time instead of run time.
This change slightly shrinks the compiled code; eg on x86-64 we save a
couple of bswapl instructions:
add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-8 (-8)
function old new delta
t3_sge_intr_msix_napi 544 536 -8
and this also has the pleasant side effect of fixing a sparse warning:
drivers/net/cxgb3/sge.c:2313:15: warning: restricted degrades to integer
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/isdn')
0 files changed, 0 insertions, 0 deletions