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Commit 129372d0 authored by Stephen Hemminger's avatar Stephen Hemminger Committed by Jeff Garzik
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[PATCH] sky2: ring distance optimization 



Faster way to compute ring distance.

Signed-off-by: default avatarStephen Hemminger <shemminger@osdl.org>
Signed-off-by: default avatarJeff Garzik <jgarzik@pobox.com>
parent f2e46561

drivers/net/sky2.c

+1 −1
Original line number Diff line number Diff line
@@ -1039,7 +1039,7 @@ static int sky2_up(struct net_device *dev) 
/* Modular subtraction in ring */

static inline int tx_dist(unsigned tail, unsigned head)

{

	return (head >= tail ? head : head + TX_RING_SIZE) - tail;

	return (head - tail) % TX_RING_SIZE;

}



/* Number of list elements available for next tx */