Re: [PATCH 2/2] kobject: add kernel/uevent_features sysfs file

Greg KH
2018-12-06T15:07:11Z

On Wed, Dec 05, 2018 at 12:27:45PM +0100, Peter Rajnoha wrote:
> We can use extended format when writing /sys/.../uevent files to
> generate synthetic uevents, introduced with commit f36776fafbaa
> ("kobject: support passing in variables for synthetic uevents").
>
> Before using this extended format, we need to know if it's supported
> and kernel version check may not be appropriate in all cases - there
> are possible differences from upstream kernel in distributions with
> backports.
>
> This patch adds /sys/kernel/uevent_features file which currently lists
> 'synthargs' string to denote that the kernel is able to recognize the
> extended synthetic uevent arguments. Userspace can easily check for
> the feature then.

No Documentation/ABI/ update for your new sysfs file? Not good, I can't
take this patch without that :(

greg k-h