RE: [PATCH rc5-rt2 2/3] plist: add new implementation

[Perez-Gonzalez, Inaky]

>From: Oleg Nesterov
>
>New implementation. It is smaller, and in my opinion cleaner.
>User-space test: http://www.tv-sign.ru/oleg/plist.tgz
>
>Like hlist, it has different types for head and node: pl_head/pl_node.
>
>pl_head does not have ->prio field. This saves sizeof(int), and we
>don't need to have it in plist_del's parameter list. This is also good
>for typechecking.
>
>Like list_add(), plist_add() does not require initialization on
pl_node,
>except ->prio.

/me suggests adding documentation to the header file succintly
explaining how it is implemented and a quick usage guide (along
with (C) info).

-- Inaky 
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