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| author |   David S. Miller <davem@davemloft.net> | 2008-01-21 02:21:45 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 15:08:39 -0800 |
| commit | 5b0ac72bc5fdda9634fb07db4cb0237fa9b6df68 (patch) | |
| tree | 26db7718b56ea492e25a5c9321f5669020bc7ea6 /net/sched | |
| parent | [PKT_SCHED] dsmark: get rid of wrappers (diff) | |
| download | linux-dev-5b0ac72bc5fdda9634fb07db4cb0237fa9b6df68.tar.xz linux-dev-5b0ac72bc5fdda9634fb07db4cb0237fa9b6df68.zip | |
[PKT_SCHED] dsmark: Use hweight32() instead of convoluted loop.
Based upon a patch by Stephen Hemminger and suggestions
from Patrick McHardy.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/sch_dsmark.c | 15 |
1 files changed, 3 insertions, 12 deletions
diff --git a/net/sched/sch_dsmark.c b/net/sched/sch_dsmark.c index a9732aef2ca1..d96eaf0aa6b8 100644 --- a/net/sched/sch_dsmark.c +++ b/net/sched/sch_dsmark.c @@ -10,6 +10,7 @@ #include <linux/errno.h> #include <linux/skbuff.h> #include <linux/rtnetlink.h> +#include <linux/bitops.h> #include <net/pkt_sched.h> #include <net/dsfield.h> #include <net/inet_ecn.h> @@ -43,17 +44,6 @@ struct dsmark_qdisc_data { int set_tc_index; }; -static inline int dsmark_valid_indices(u16 indices) -{ - while (indices != 1) { - if (indices & 1) - return 0; - indices >>= 1; - } - - return 1; -} - static inline int dsmark_valid_index(struct dsmark_qdisc_data *p, u16 index) { return (index <= p->indices && index > 0); @@ -348,7 +338,8 @@ static int dsmark_init(struct Qdisc *sch, struct rtattr *opt) goto errout; indices = RTA_GET_U16(tb[TCA_DSMARK_INDICES-1]); - if (!indices || !dsmark_valid_indices(indices)) + + if (hweight32(indices) != 1) goto errout; if (tb[TCA_DSMARK_DEFAULT_INDEX-1]) |