From: Eric Dumazet <redacted>
Date: Wed, 30 Jul 2014 23:38:18 +0200

From: Eric Dumazet <edumazet@google.com>

Remove '__' prefix, it has no purpose.

Signed-off-by: Eric Dumazet <edumazet@google.com>

Actually, I think it does.

If you look at where this came from, it's commit:

commit b50026b5ac8fe2932e6af0c54b21da0913c4c1c7
Author: Hannes Frederic Sowa [off-list ref]
Date:   Sat Oct 19 21:48:52 2013 +0200

    ipv6: split inet6_ehashfn to hash functions per compilation unit

and in that change Hannes uses the convention that __foo() functions
take an initval argument for the hash computation where as foo()
functions do not.

I'm not applying this, sorry :)