drivers/usb/gadget/imx_udc.c:39:27: fatal error: mach/hardware.h: No such file or directory drivers/usb/gadget/fsl_mxc_udc.c:21:27: fatal error: mach/hardware.h: No such file or directory is rather suggestive in my OMAP4 randconfig build. Might like to have this fixed before the next merge window, so we don't cause regressions.