Re: [PATCH 01/19] char_dev: replace cdev_map with an xarray

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On Thu, Aug 27, 2020 at 11:18:59AM +0200, Greg Kroah-Hartman wrote:
I looked at it, but it does get registered and shows up in sysfs.

It does?  Where does that happen?  I see a bunch of kobject_init()
calls, but nothing that registers it in sysfs that I can see.

Hmm, true.


Note, this is not the kobject that shows up in /sys/dev/char/ as a
symlink, that comes from the driver core logic and is independent of the
cdev code.

The kobject does handle the structure lifetime rules, but that should be
able to be replaced with a simple kref instead.

Yeah.  I'll let you handle this stuff, as you obviously know the area
better than I do.



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