Re: [PATCH] md: do not use ++ in rcu_dereference() argument

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On Thu, 16 Sep 2010 14:54:29 +0200
Avi Kivity <avi@xxxxxxxxxx> wrote:

>   On 09/06/2010 08:29 AM, Neil Brown wrote:
> > I've taken the opportunity to substantially re-write that code.
> >
> >
> 
> It's better to have two patches, one a backportable one liner that fixes 
> the bug, the other, on top, that cleans up the code but has no sematic 
> changes.
> 
> This makes it substantially easier to review.  When considering the 
> first patch you see the change plainly.  When reviewing the second patch 
> you make sure no semantic changes were made at all.
> 

Good advice, I agree.

However the conversation seem have drifted towards viewing the new macro
definition as the bug, and the pre-increment in an argument as a valid thing
to do.
In that case, there is no bug to fix, just a code clean up required.
So I'm currently planning on just submitting that cleanup in the next merge
window, and leaving the rcu guys to 'fix' the macro.

Thanks,
NeilBrown
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