On Thu, 2 Feb 2012, paul_kon...@dell.com wrote:
A rw_lock allows multiple readers, correct? If there's a non-trivial probability of concurrent reads that would make a difference. If not, then a mutex would be just as good especially if that is lower overhead.
The rwlock in question is contained with the driver's softc. The only exported accessors are i2c_bus_acquire() (which grabs a RW_WRITER lock) and i2c_bus_release().
A mutex makes much more sense. ------------------------------------------------------------------------- | Paul Goyette | PGP Key fingerprint: | E-mail addresses: | | Customer Service | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com | | Network Engineer | 0786 F758 55DE 53BA 7731 | pgoyette at juniper.net | | Kernel Developer | | pgoyette at netbsd.org | -------------------------------------------------------------------------
