Re: [PATCH] Replace completions with semaphores

[Roland Dreier]

 > The cookies aren't checked by the kcounter implementation if
 > CONFIG_DEBUG_KCOUNTER isn't set.  So you can avoid storing them if it's
 > *really* that important to shrink your data structures.

I guess if anyone cared we could have something analogous to
DECLARE_PCI_UNMAP_ADDR() et al that compiles to nothing if
CONFIG_DEBUG_KCOUNTER isn't set.  But I'm not sure it's worth it.
Certainly for the mthca/mlx4 cases of semaphore use there's no problem
holding onto a cookie.

 - R.
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