From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH 09/18] fs: Introduce per-bucket inode hash locks
Date: Wed, 13 Oct 2010 11:05:47 -0400
Message-ID: <20101013150547.GA12757@infradead.org>
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Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
To: Dave Chinner <david@fromorbit.com>
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> +
> +/**
> + * hlist_bl_lock	- lock a hash list
> + * @h:	hash list head to lock
> + */
> +static inline void hlist_bl_lock(struct hlist_bl_head *h)
> +{
> +	bit_spin_lock(0, (unsigned long *)h);
> +}
> +
> +/**
> + * hlist_bl_unlock	- unlock a hash list
> + * @h:	hash list head to unlock
> + */
> +static inline void hlist_bl_unlock(struct hlist_bl_head *h)
> +{
> +	__bit_spin_unlock(0, (unsigned long *)h);
> +}

I think the locking helpers should come with the rest of the bl_list
implementation in patch1.