Hashtable implementation breaks on flow statements

[Schrober]

Hi,

I think the new hash implementation in include/linux/hashtable.h is slightly 
unintuitive when using things like hash_for_each, hash_for_each_rcu, 
hash_for_each_safe and hash_for_each_possible.

Users may want to get out of the loop through the hashtable iteration when 
some condition is met. This works well on hlist, list and other "abstract" 
data types. But the hash table would just jump to the next bucket and 
continue.
-- 
Franz Schrober
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