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| author |   Daniel Borkmann <dborkman@redhat.com> | 2014-01-22 02:29:40 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-01-21 23:17:20 -0800 |
| commit | 89770b0a69ee0e0e5e99c722192d535115f73778 (patch) | |
| tree | a8c96a91c2417dc81f5ce08aa59ebcfd456e0335 /include/net/codel.h | |
| parent | random32: add prandom_u32_max and convert open coded users (diff) | |
| download | linux-dev-89770b0a69ee0e0e5e99c722192d535115f73778.tar.xz linux-dev-89770b0a69ee0e0e5e99c722192d535115f73778.zip | |
net: introduce reciprocal_scale helper and convert users
As David Laight suggests, we shouldn't necessarily call this
reciprocal_divide() when users didn't requested a reciprocal_value();
lets keep the basic idea and call it reciprocal_scale(). More
background information on this topic can be found in [1].
Joint work with Hannes Frederic Sowa.
[1] http://homepage.cs.uiowa.edu/~jones/bcd/divide.html
Suggested-by: David Laight <david.laight@aculab.com>
Cc: Jakub Zawadzki <darkjames-ws@darkjames.pl>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/codel.h')
| -rw-r--r-- | include/net/codel.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/include/net/codel.h b/include/net/codel.h index 3b04ff5f6f8d..fe0eab32ce76 100644 --- a/include/net/codel.h +++ b/include/net/codel.h @@ -46,7 +46,6 @@ #include <linux/skbuff.h> #include <net/pkt_sched.h> #include <net/inet_ecn.h> -#include <linux/reciprocal_div.h> /* Controlling Queue Delay (CoDel) algorithm * ========================================= @@ -211,10 +210,9 @@ static codel_time_t codel_control_law(codel_time_t t, codel_time_t interval, u32 rec_inv_sqrt) { - return t + reciprocal_divide(interval, rec_inv_sqrt << REC_INV_SQRT_SHIFT); + return t + reciprocal_scale(interval, rec_inv_sqrt << REC_INV_SQRT_SHIFT); } - static bool codel_should_drop(const struct sk_buff *skb, struct Qdisc *sch, struct codel_vars *vars, |