in cpu_down(), _cpu_down() will do
"
if (num_online_cpus() == 1)
return -EBUSY;
"
when cpu_hotplug_disabled was set, num_online_cpus
will return 1 for there's only 1 boot cpu.
so, it's unnecessary to check cpu_hotplug_disabled
here.
Signed-off-by: liguang <lig.f...@cn.fujitsu.com>
---
kernel/cpu.c | 6 ------
1 files changed, 0 insertions(+), 6 deletions(-)
diff --git a/kernel/cpu.c b/kernel/cpu.c
index b5e4ab2..cd166d3 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -330,14 +330,8 @@ int __ref cpu_down(unsigned int cpu)
cpu_maps_update_begin();
- if (cpu_hotplug_disabled) {
- err = -EBUSY;
- goto out;
- }
-
err = _cpu_down(cpu, 0);
-out:
cpu_maps_update_done();
return err;
}
--
1.7.2.5
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