Re: [PATCH 1/2] async: async device driver probing

[Greg KH <gregkh@linuxfoundation.org>]

On Sat, Feb 08, 2014 at 07:05:38PM +0800, falcon@meizu.com wrote:
> From: Wu Zhangjin <wuzhangjin@gmail.com>
> 
> [*Note*: NOT applicable, only for comments.]
> 
> To async the slow driver probing function of some devices, the device probing
> support is modified to support async scheduling.
> 
> In order to async your driver probing function, please mask the async_probe
> flag to 1, and to make sure one asynced probing is executed before an specified
> point, please call async_synchronize_full() in that point..
> 
> Usage:
> 
> 	static struct i2c_driver test_driver = {
> 		.driver = {
> 			.name   = TEST_DEV_NAME,
> 			.owner  = THIS_MODULE,
> 	+               .async_probe = 1,
> 		},

Why is this needed, we have defered probing and the container stuff, so
what problem is this solving?

greg k-h