kris at FreeBSD.org
Sun Feb 24 10:46:48 UTC 2008
Barney Cordoba wrote:
> I'm porting some older software to 7.0 and I see that
> many of the 7.0 drivers use both locks and splimps()
> to protect code, particularly the firewire driver.
> What cases would an splimp() be required?
spl*() are NOPs that are only left behind in some code as a reminder of
what mutual exclusion protections used to apply, mostly in cases where
there has not been fine-grained locking applied to the code in question.
In some (most?) cases they serve no useful annotation purpose and
should just be removed. For newly written code they should be added.
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