> + help
> + This will build a kernel module called mmiotrace.
> + Making this a built-in is heavily discouraged.
> +
> + Mmiotrace traces Memory Mapped I/O access and is meant for debugging
> + and reverse engineering. The kernel module offers wrapped
> + versions of the ioremap family of functions. The driver to be traced
> + must be modified to call these wrappers. A user space program is
> + required to collect the MMIO data.
> +
> + See
http://nouveau.freedesktop.org/wiki/MmioTrace
> + If you are not helping to develop drivers, say N.
> +
> +config MMIOTRACE_TEST
> + tristate "Test module for mmiotrace"
> + depends on MMIOTRACE && m
> + default n
> + help
> + This is a dumb module for testing mmiotrace. It is very dangerous
> + as it will write garbage to IO memory starting at a given address.
> + However, it should be safe to use on e.g. unused portion of VRAM.
> +
> + Say N, unless you absolutely know what you are doing.
> +
> #
> # IO delay types:
> #
> diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
> index 9832910..e182f6d 100644
> --- a/arch/x86/mm/Makefile
> +++ b/arch/x86/mm/Makefile
> @@ -3,3 +3,8 @@ include ${srctree}/arch/x86/mm/Makefile_32
> else
> include ${srctree}/arch/x86/mm/Makefile_64
> endif
> +
> +obj-$(CONFIG_MMIOTRACE_HOOKS) += kmmio.o
> +obj-$(CONFIG_MMIOTRACE) += mmiotrace.o
> +mmiotrace-objs := pf_in.o mmio-mod.o
