Re: [PATCH 10/19] workqueue: update cwq alignement and make one more flag bit available

[David Howells]

Tejun Heo <tj@xxxxxxxxxx> wrote:

> +enum {
> +	WORK_STRUCT_PENDING	= 0,	/* work item is pending execution */
> +
> +	/*
> +	 * Reserve 3bits off of cwq pointer.  This is enough and
> +	 * provides acceptable alignment on both 32 and 64bit
> +	 * machines.
> +	 */
> +	WORK_STRUCT_FLAG_BITS	= 3,
> +
> +	WORK_STRUCT_FLAG_MASK	= (1UL << WORK_STRUCT_FLAG_BITS) - 1,
> +	WORK_STRUCT_WQ_DATA_MASK = ~WORK_STRUCT_FLAG_MASK,
> +};

There's some great enum abuse going on here:-)

David
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