From: Jesse Brandeburg <[email protected]> Implement a slightly faster bit check, used for checking descriptors in the hot path.
Signed-off-by: Jesse Brandeburg <[email protected]> Signed-off-by: Paul M Stillwell Jr <[email protected]> --- v2: fixed checkpatch issues --- drivers/net/ice/ice_rxtx.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/drivers/net/ice/ice_rxtx.c b/drivers/net/ice/ice_rxtx.c index c794ee8..7c82931 100644 --- a/drivers/net/ice/ice_rxtx.c +++ b/drivers/net/ice/ice_rxtx.c @@ -955,14 +955,13 @@ static inline uint64_t ice_rxd_status_to_pkt_flags(uint64_t qword) { - uint64_t flags; - - /* Check if RSS_HASH */ - flags = (((qword >> ICE_RX_DESC_STATUS_FLTSTAT_S) & - ICE_RX_DESC_FLTSTAT_RSS_HASH) == - ICE_RX_DESC_FLTSTAT_RSS_HASH) ? PKT_RX_RSS_HASH : 0; - - return flags; + static const uint64_t bitcheck = + (ICE_RX_DESC_FLTSTAT_RSS_HASH << ICE_RX_DESC_STATUS_FLTSTAT_S); + /* Check if RSS_HASH */ + if ((qword & bitcheck) == bitcheck) + return PKT_RX_RSS_HASH; + + return 0; } /* Rx L3/L4 checksum */ -- 1.8.3.1
