Add __attribute__((__format__(__printf__,2,3))) to device_printf()
so that the compiler will help us detect bad arguments.
Retire unused subroutine m_defrag(), and unused declaration m_getcl().
to use.
Also, add sysctl helper macro SYSCTL_PFX_INT (for SampleRate) that
prepends an arbitrary prefix to the sysctl name, instead of sc->sc_
like SYSCTL_INT. Factor with SYSCTL_INT.
+ Synchronize ath_calibrate() with ATH_LOCK()/ATH_UNLOCK(). Thanks
to Steve Woodford for suggesting this fix. This patch stops
ath(4) from generating messages "hardware error; resetting" while
Steve's D-Link DWL-AG650 card is operating (kern/28385). The
MiniPCI wireless adapter on one of my Soekris boards also operates
more reliably following this patch.
+ Use ATH_LOCK_IMPL() and family to synchronize access to the
transmit queue, also.
