Messages in this thread Patch in this message | | | From | liguang <> | Subject | [PATCH] cpu: rid cpu_hotplug_disabled check for cpu_down() | Date | Mon, 29 Apr 2013 10:49:51 +0800 |
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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.fnst@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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