On Wed, Jul 1, 2015 at 8:59 AM, Christoph Hellwig <h...@lst.de> wrote: > On Wed, Jul 01, 2015 at 08:55:57AM +0200, Geert Uytterhoeven wrote: >> > >> > I think doing this at runtime might be a better idea. E.g. a >> > ioremap_flags with the CACHED argument will return -EOPNOTSUP unless >> > actually implemented. On various architectures different CPUs or >> > boards will have different capabilities in this area. >> >> So it would be the responsibility of the caller to fall back from >> ioremap(..., CACHED) to ioremap(..., UNCACHED)? >> I.e. all drivers using it should be changed... > > All of the zero users we currently have will need to be changed, yes.
Good. Less work to convert all of these ;-) > Note that I propose to leave ioremap(), aka ioremap_flags(..., 0) as > a default that always has to work, -EOPNOTSUP is only a valid return > value for non-default flaga. OK. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/