Re: [PATCH 1/3] mpt2sas: remove the use of writeq, since writeq isnot atomic

[Hitoshi Mitake]

On Thu, May 19, 2011 at 04:11, Moore, Eric <Eric.Moore@xxxxxxx> wrote:
> On Wednesday, May 18, 2011 12:31 PM Milton Miller wrote:
>> Ingo I would propose the following commits added in 2.6.29 be reverted.
>> I think the current concensus is drivers must know if the writeq is
>> not atomic so they can provide their own locking or other workaround.
>>
>
>
> Exactly.
>

The original motivation of preparing common readq/writeq is that
letting each driver
have their own readq/writeq is bad for maintenance of source code.

But if you really dislike them, there might be two solutions:

1. changing the name of readq/writeq to readq_nonatomic/writeq_nonatomic
2. adding new C file to somewhere and defining spinlock for them.
    With spin_lock_irqsave() and spin_unlock_irqrestore() on the spinlock,
    readq/writeq can be atomic.

How do you think about them? If you cannot agree with the above two solutions,
I'll agree with reverting them.

-- 
Hitoshi Mitake
h.mitake@xxxxxxxxx
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