Re: [PATCH 09/18] fs: rework icount to be a locked variable

[Christoph Hellwig]

On Fri, Oct 08, 2010 at 06:50:01PM +1100, Dave Chinner wrote:
> > There's no need to lock a normal 32-bit variable for readers.
> 
> Ok, but will need a memory barrier instead?

Isn't spin_unlock supposed to be one?  I'll need some of the locking
experts to shime in.

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