Re: [PATCH 23/38] cls_api: Convert tcf_net to XArray

From: Matthew Wilcox <willy@infradead.org>
Date: Tue, 20 Aug 2019 15:32:44 -0700

From: "Matthew Wilcox (Oracle)" <willy@infradead.org>

This module doesn't use the allocating functionality; convert it to a
plain XArray instead of an allocating one.  I've left struct tcf_net
in place in case more objects are added to it in future, although
it now only contains an XArray.  We don't need to call xa_destroy()
if the array is empty, so I've removed the contents of tcf_net_exit()
-- if it can be called with entries still in place, then it shoud call
xa_destroy() instead.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

I don't know if the net exit can be invoked with entires still in place,
however if the tcf_net_exit() function is made empty it should be removed
along with the assignment to the per-netns ops.