Re: [PATCH scsi-misc-2.6 10/13] scsi: rewrite scsi_request_fn()

From: Tejun Heo
Date: Fri Apr 01 2005 - 00:46:19 EST


Hello, Christoph.

On Thu, Mar 31, 2005 at 12:14:16PM +0100, Christoph Hellwig wrote:
> the changes look good to me (although I haven't tested any of your patches
> yet), but the code flow is rather confusing. What do you think about
> the not even compile version of scsi_request_fn() below that should be
> functionally identical to yours:

Yes, it's rather confusing. I was a bit concerned about forward
gotos which are not error handling/exit and possible needs for
unlikely()'s by putting error handling on hotter path, IOW, untaken
forward branch. For the records, I think the likely/unlikely thingies
are ugly & over-optimization in many cases.

However, your code is aesthetically much better. If there are no
opjections regarding the forward non-error-exit jumps, I'll reorganize
the code mostly as you suggested in the next take of this patchset.

Thanks a lot. :-)

--
tejun

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