linux-kernel - Re: [PATCH] hpsa: do not re-order commands in internal queues

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Date:	Tue, 11 Jan 2011 18:01:20 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	"Stephen M. Cameron" <scameron@...rdog.cce.hp.com>
Cc:	james.bottomley@...senpartnership.com, linux-scsi@...r.kernel.org,
	mike.miller@...com, linux-kernel@...r.kernel.org,
	thenzl@...hat.com, akpm@...ux-foundation.org, smcameron@...oo.com
Subject: Re: [PATCH] hpsa: do not re-order commands in internal queues

> -static inline void addQ(struct hlist_head *list, struct CommandList *c)
> +static inline void addQ(struct list_head *list, struct CommandList *c)
>  {
> -	hlist_add_head(&c->list, list);
> +	list_add_tail(&c->list, list);
>  }
>  
>  static inline u32 next_command(struct ctlr_info *h)
> @@ -366,9 +366,9 @@ static void enqueue_cmd_and_start_io(struct ctlr_info *h,
>  
>  static inline void removeQ(struct CommandList *c)
>  {
> -	if (WARN_ON(hlist_unhashed(&c->list)))
> +	if (WARN_ON(list_empty(&c->list)))
>  		return;
> -	hlist_del_init(&c->list);
> +	list_del_init(&c->list);

Any reason to keep these helpers?  They don't really help
clarifying the code, and iterations also use the list directly, thus
breaking the abstraction.
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