Hi Thomas, > > But I am missing something somewhere as I cannot see how this builds. > > asm-generic now provide the fb_read/fb_write helpers. > > But for example sparc has an architecture specifc fb.h so it will not > > use the asm-generic variant. So I wonder how sparc get hold of the > > asm-generic fb.h file? > > All architecture's <asm/fb.h> files include <asm-generic/fb.h>, so that they > all get the interfaces which they don't define themselves. For Sparc, this > is at [1]. > > Best regards > Thomas > > > [1] > https://cgit.freedesktop.org/drm/drm-tip/tree/arch/sparc/include/asm/fb.h#n19 > > > > > Maybe it is obvious, but I miss it. OK, it was obvious and I missed it. I looked at the mainline kernel, and not the drm-tip variant. Sorry for the noise. Sam