On Wed, 29 Sep 2010 22:18:33 +1000 Dave Chinner <david@xxxxxxxxxxxxx> wrote:
> From: Nick Piggin <npiggin@xxxxxxx>
>
> Introduce a type of hlist that can support the use of the lowest bit
> in the hlist_head. This will be subsequently used to implement
> per-bucket bit spinlock for inode hashes.
>
>
> ...
>
> +static inline void INIT_HLIST_BL_NODE(struct hlist_bl_node *h)
> +{
> + h->next = NULL;
> + h->pprev = NULL;
> +}
No need to shout.
>
> ...
>
> +static inline void hlist_bl_del(struct hlist_bl_node *n)
> +{
> + __hlist_bl_del(n);
> + n->next = LIST_POISON1;
> + n->pprev = LIST_POISON2;
> +}
I'd suggest creating new poison values for hlist_bl's, leave
LIST_POISON1 and LIST_POISON2 for list_head (and any other list
variants which went and used them :()
>
> ...
>
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