On Wed, 18 Nov 2015, Petr Mladek wrote:
> kthread_create_on_cpu() was added by the commit 2a1d446019f9a5983e
> ("kthread: Implement park/unpark facility"). It is currently used
> only when enabling new CPU. For this purpose, the newly created
> kthread has to be parked.
>
> The CPU binding is a bit tricky. The kthread is parked when the CPU
> has not been allowed yet. And the CPU is bound when the kthread
> is unparked.
>
> The function would be useful for more per-CPU kthreads, e.g.
> bnx2fc_thread, fcoethread. For this purpose, the newly created
> kthread should stay in the uninterruptible state.
>
> This patch moves the parking into smpboot. It binds the thread
> already when created. Then the function might be used universally.
> Also the behavior is consistent with kthread_create() and
> kthread_create_on_node().
>
> Signed-off-by: Petr Mladek <pmladek@xxxxxxxx>
Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
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