[PATCH] Make em(4) use device sysctl tree

[Petri Helenius]

Bruce M Simpson wrote:

>Here is a non-critical patch to bring em(4) into line with other
>drivers, by using the sysctl tree created for each device by the
>bus framework.
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Does anyone here have an idea why some platforms (like Thinkpad X31 or 
i875 Supermicros) have trouble rebooting with 5.3-BETA when em is used 
as a module (they hang at "shutting down ACPI")  while with 5.2.1-REL 
the same scenario works fine?

Pete

>Please review; Thanks.
>BMS
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