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authorYury Norov <yury.norov@gmail.com>2022-02-10 14:49:05 -0800
committerThomas Gleixner <tglx@linutronix.de>2022-04-10 22:20:28 +0200
commit911488de0565f1d53bd36174d20917ebc4b44c0e (patch)
tree720dfe6e4dc2bed7e938ba5a3689c0010faa1f0f /kernel/irq
parent3f893a5962d31c0164efdbf6174ed0784f1d7603 (diff)
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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. This can be done 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: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20220210224933.379149-22-yury.norov@gmail.com
Diffstat (limited to 'kernel/irq')
-rw-r--r--kernel/irq/affinity.c2
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);