Re: [PATCH] block: kill not-so-popular simple flag testing macros

[Jeff Garzik <jgarzik@pobox.com>]

Tejun Heo wrote:
> This patch kills the following request flag testing macros.
>
> blk_noretry_request()
> blk_rq_started()
> blk_pm_suspend_request()
> blk_pm_resume_request()
> blk_sorted_rq()
> blk_barrier_rq()
> blk_fua_rq()
>
> All above macros test for single request flag and not used widely and
> seem to contribute more to obscurity than readability.
>
> Signed-off-by: Tejun Heo <htejun@gmail.com>

heh, I guess that's a manner of opinion :)

To me, your patch makes things less readable.  Example:

> -	int is_barrier = blk_fs_request(rq) && blk_barrier_rq(rq);
> +	int is_barrier = blk_fs_request(rq) && rq->flags & REQ_HARDBARRIER;

After your change is applied, the above statement is no longer visually 
consistent with itself.  The reader must decode two different styles of 
test in his brain, as opposed to one.

	Jeff


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