diff options
| author |   Yury Norov <yury.norov@gmail.com> | 2022-02-10 14:49:06 -0800 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2022-02-16 15:57:53 +0100 |
| commit | 1087ad4e3f88c474b8134a482720782922bf3fdf (patch) | |
| tree | 93a95570454dd39c349d0e99bf1aab4408e6e218 /kernel/sched/topology.c | |
| parent | sched/numa-balancing: Move some document to make it consistent with the code (diff) | |
| download | wireguard-linux-1087ad4e3f88c474b8134a482720782922bf3fdf.tar.xz wireguard-linux-1087ad4e3f88c474b8134a482720782922bf3fdf.zip | |
sched: replace cpumask_weight with cpumask_empty where appropriate
In some places, kernel/sched code calls cpumask_weight() to check if
any bit of a given cpumask is set. We can do it more efficiently with
cpumask_empty() because cpumask_empty() stops traversing the cpumask as
soon as it finds first set bit, while cpumask_weight() counts all bits
unconditionally.
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220210224933.379149-23-yury.norov@gmail.com
Diffstat (limited to 'kernel/sched/topology.c')
| -rw-r--r-- | kernel/sched/topology.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index e6cd55951304..1c84b48def20 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -74,7 +74,7 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level, break; } - if (!cpumask_weight(sched_group_span(group))) { + if (cpumask_empty(sched_group_span(group))) { printk(KERN_CONT "\n"); printk(KERN_ERR "ERROR: empty group\n"); break; |