From: Stephen Hemminger <step...@networkplumber.org>
Date: Fri, 25 Oct 2013 08:41:34 -0700
> I would rather not fix the warning this way since it risks masking
> later bugs if this code ever changes.
But this is suboptimally coded, and is asking for the warning.
Anything returning a pointer by reference is asking for trouble
in my opinion.
The correct thing to do is to make create_v{4,6}_sock() return
the "struct socket *" as an error pointer.
No more ambiguous initializations, no more warnings.
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