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Subject[PATCH] Fixup MODULE_DEVICE_TABLE(dmi, ...)
On Sat, Nov 15, 2008 at 11:14:52AM +0000, David Woodhouse wrote:
> On Sat, 2008-11-15 at 02:41 +0300, Alexey Dobriyan wrote:
> > How can this work, given that MODULE_DEVICE_TABLE line expands into
> >
> > extern const struct dmi_device_id __mod_dmi_device_table
> > __attribute__ ((unused, alias("mbp_device_table")));
> > ^^^^^^
> > but there is no struct dmi_device_id, there is struct dmi_system_id?
>
> Interesting question ;)
>
> It actually looks like this...
>
> static struct dmi_system_id __initdata mbp_device_table[] = {
> ...
> };
>
> extern const struct dmi_device_id __mod_dmi_device_table \
> __attribute__ ((unused, alias("mbp_device_table")));
>
> So 'struct dmi_device_id' isn't ever really used -- it's just like a
> forward declaration of a struct, and the compiler doesn't care because
> it never needs to know anything more about that struct.
>
> Not ideal though -- we should probably see if we can fix it. I suspect
> it's not worth a global change of dmi_system_id to dmi_device_id
> though... got any better ideas?
>
> Maybe we could change MODULE_GENERIC_TABLE to be more agnostic about the
> datatype -- just call it and 'extern char'. After all, it's only for the
> linker.

Let's do it the most staightforward way :-)


[PATCH] Fixup MODULE_DEVICE_TABLE(dmi, ...)

drivers/video/backlight/mbp_nvidia_bl.c:114: error: storage size of '__mod_dmi_device_table' isn't known

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---

include/linux/mod_devicetable.h | 1 +
1 file changed, 1 insertion(+)

--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -443,6 +443,7 @@ struct dmi_system_id {
struct dmi_strmatch matches[4];
void *driver_data;
};
+#define dmi_device_id dmi_system_id /* fixup MODULE_DEVICE_TABLE(dmi,...); */
#endif

#define DMI_MATCH(a, b) { a, b }

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