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| author | Yury Norov <yury.norov@gmail.com> | 2022-01-23 10:38:51 -0800 |
|---|---|---|
| committer | Yury Norov <yury.norov@gmail.com> | 2022-06-03 06:52:57 -0700 |
| commit | 99248e351a2712154d1120ab003d89635c4e8e72 (patch) | |
| tree | 23541d56746569584efc0f7ae75da7b6ce8ae375 | |
| parent | d72002ae67adb1c665e43970685b16645023d639 (diff) | |
| download | lwn-99248e351a2712154d1120ab003d89635c4e8e72.tar.gz lwn-99248e351a2712154d1120ab003d89635c4e8e72.zip | |
genirq/affinity: replace cpumask_weight with cpumask_empty where appropriate
__irq_build_affinity_masks() 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>
| -rw-r--r-- | kernel/irq/affinity.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c index f7ff8919dc9b..18740faf0eb1 100644 --- a/kernel/irq/affinity.c +++ b/kernel/irq/affinity.c @@ -258,7 +258,7 @@ static int __irq_build_affinity_masks(unsigned int startvec, nodemask_t nodemsk = NODE_MASK_NONE; struct node_vectors *node_vectors; - if (!cpumask_weight(cpu_mask)) + if (cpumask_empty(cpu_mask)) return 0; nodes = get_nodes_in_cpumask(node_to_cpumask, cpu_mask, &nodemsk); |