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Date: Tue, 1 Jul 2003 10:38:34 -0700 (PDT)
From: Nate Lawson <nate@root.org>
To: Scott Long <scottl@FreeBSD.org>
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Subject: Re: cvs commit: src/sys/alpha/alpha
	busdma_machdep.csrc/sys/alpha/include
	bus.h src/sys/alpha/isa isa_dma.c src/sys/amd64/amd64        
	busdma_machdep.c src/sys/amd64/include bus_dma.h src/
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On Tue, 1 Jul 2003, Scott Long wrote:
> +/*
> + * dflt_lock should never get called.  It gets put into the dma tag when
> + * lockfunc == NULL, which is only valid if the maps that are associated
> + * with the tag are meant to never be defered.
> + * XXX Should have a way to identify which driver is responsible here.
> + */
> +static void
> +dflt_lock(void *arg, bus_dma_lock_op_t op)
> +{
> +#ifdef INVARIANTS
> +	panic("driver error: busdma dflt_lock called");
> +#else
> +	printf("DRIVER_ERROR: busdma dflt_lock called\n");
> +#endif
> +}
> +

backtrace()?

-Nate