On Mon, Aug 19, 2013 at 09:24:01AM +0800, Peter Chen wrote: > On Sun, Aug 18, 2013 at 10:20:44PM +0200, Geert Uytterhoeven wrote: > > If NO_DMA=y: > > > > drivers/built-in.o: In function `dma_set_coherent_mask': > > include/linux/dma-mapping.h:93: undefined reference to `dma_supported' > > > > Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> > > --- > > drivers/usb/chipidea/Kconfig | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/usb/chipidea/Kconfig b/drivers/usb/chipidea/Kconfig > > index d1bd8ef..dbd5232 100644 > > --- a/drivers/usb/chipidea/Kconfig > > +++ b/drivers/usb/chipidea/Kconfig > > @@ -1,6 +1,6 @@ > > config USB_CHIPIDEA > > tristate "ChipIdea Highspeed Dual Role Controller" > > - depends on USB || USB_GADGET > > + depends on (USB || USB_GADGET) && HAS_DMA > > help > > Say Y here if your system has a dual role high speed USB > > controller based on ChipIdea silicon IP. Currently, only the > > I can't understand why the DMA can't be changed to fix this instead > of changing every driver? I'm with you. It'd be nicer to just provide empty stubs when !HAS_DMA -- balbi
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