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authorYury Norov <yury.norov@gmail.com>2022-01-23 10:38:56 -0800
committerYury Norov <yury.norov@gmail.com>2022-06-03 06:52:57 -0700
commitb55032f1067a02c7f80943dd118060952e8bd7ac (patch)
treed24cf74d8214ffed9cd1d9d8c5f4407e6621cd4b /mm/vmstat.c
parent95e3a97387d6c396172f944b45bd515c7d1e8bc2 (diff)
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mm/vmstat: replace cpumask_weight with cpumask_empty where appropriate
mm/vmstat.c 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> Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Diffstat (limited to 'mm/vmstat.c')
-rw-r--r--mm/vmstat.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c
index b75b1a64b54c..12c771e4d195 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -2042,7 +2042,7 @@ static void __init init_cpu_node_state(void)
int node;
for_each_online_node(node) {
- if (cpumask_weight(cpumask_of_node(node)) > 0)
+ if (!cpumask_empty(cpumask_of_node(node)))
node_set_state(node, N_CPU);
}
}
@@ -2074,7 +2074,7 @@ static int vmstat_cpu_dead(unsigned int cpu)
refresh_zone_stat_thresholds();
node_cpus = cpumask_of_node(node);
- if (cpumask_weight(node_cpus) > 0)
+ if (!cpumask_empty(node_cpus))
return 0;
node_clear_state(node, N_CPU);