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Date: Mon, 29 Apr 2013 10:49:51 +0800 From: liguang <lig.fnst@...fujitsu.com> To: linux-kernel@...r.kernel.org Cc: Thomas Gleixner <tglx@...utronix.de>, Andrew Morton <akpm@...ux-foundation.org>, "Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>, Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>, Anton Vorontsov <anton.vorontsov@...aro.org>, liguang <lig.fnst@...fujitsu.com> Subject: [PATCH] cpu: rid cpu_hotplug_disabled check for cpu_down() 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@...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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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