RE: [PATCH 2/4] rt_mutex: add new plist implementation

[Perez-Gonzalez, Inaky]

Hi Oleg

>From: Oleg Nesterov

>+extern void plist_add(struct pl_node *node, struct pl_head *head);
>+extern void plist_del(struct pl_node *node);

At least I'd add return codes for this if the head's priority 
changes (or in this case, because head's have no prio, if the 
first node's  prio change). Both function's  logic should make
it easy to test and it'd save a lot of code in the caller.

-- Inaky
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