Re: [PATCH] cpu: rid cpu_hotplug_disabled check for cpu_down()

2013-04-28 Thread li guang
在 2013-04-29一的 10:29 +0530，Srivatsa S. Bhat写道： > On 04/29/2013 10:12 AM, li guang wrote: > > 在 2013-04-29一的 10:00 +0530，Srivatsa S. Bhat写道： > >> On 04/29/2013 08:19 AM, liguang wrote: > >>> in cpu_down(), _cpu_down() will do > >>> " > >>> if (num_online_cpus() == 1) > >>> r

Re: [PATCH] cpu: rid cpu_hotplug_disabled check for cpu_down()

2013-04-28 Thread Srivatsa S. Bhat
On 04/29/2013 10:12 AM, li guang wrote: > 在 2013-04-29一的 10:00 +0530，Srivatsa S. Bhat写道： >> On 04/29/2013 08:19 AM, liguang wrote: >>> in cpu_down(), _cpu_down() will do >>> " >>> if (num_online_cpus() == 1) >>> return -EBUSY; >>> " >>> when cpu_hotplug_disabled was set, nu

Re: [PATCH] cpu: rid cpu_hotplug_disabled check for cpu_down()

2013-04-28 Thread li guang
在 2013-04-29一的 10:00 +0530，Srivatsa S. Bhat写道： > On 04/29/2013 08:19 AM, liguang wrote: > > 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

Re: [PATCH] cpu: rid cpu_hotplug_disabled check for cpu_down()

2013-04-28 Thread Srivatsa S. Bhat
On 04/29/2013 08:19 AM, liguang wrote: > 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_d

[PATCH] cpu: rid cpu_hotplug_disabled check for cpu_down()

2013-04-28 Thread liguang
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 --- kernel/cpu.