From 129372d0524c9124d5693f63c1d3c1ce2e3714ce Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Fri, 9 Dec 2005 11:34:59 -0800 Subject: [PATCH] sky2: ring distance optimization Faster way to compute ring distance. Signed-off-by: Stephen Hemminger Signed-off-by: Jeff Garzik --- drivers/net/sky2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/net/sky2.c') diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index eae270d8180..2dd46a05fb3 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -1039,7 +1039,7 @@ err_out: /* 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 */ -- cgit v1.2.3