[PATCH] kernel/cpu.c: fix init_cpu_online

[Yury Norov <yury.norov@xxxxxxxxx>]

cpu_online_mask has an associate counter of online cpus, which must be
initialized in init_cpu_online().

Fixes: 0c09ab96fc82010 (cpu/hotplug: Cache number of online CPUs)
Signed-off-by: Yury Norov <yury.norov@xxxxxxxxx>
---
 kernel/cpu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 407a2568f35e..cd7605204d4d 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -2616,6 +2616,7 @@ void init_cpu_possible(const struct cpumask *src)
 void init_cpu_online(const struct cpumask *src)
 {
 	cpumask_copy(&__cpu_online_mask, src);
+	atomic_set(&__num_online_cpus, cpumask_weight(cpu_online_mask));
 }
 
 void set_cpu_online(unsigned int cpu, bool online)
-- 
2.30.2