On Mon, Jan 12, 2015 at 6:59 PM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote: >> > Build failures, seen since next-20150109: >> > m68k:allmodconfig >> > powerpc:ppc6xx_defconfig It looks like parisc is also suffering: http://kisskb.ellerman.id.au/kisskb/buildresult/12343847/ >> > Due to: >> > ERROR: "__get_user_bad" [drivers/gpu/drm/drm.ko] undefined! >> > make[1]: *** [__modpost] Error 1 >> > >> > Caused by commit d34f20d6e2f (drm: Atomic modeset ioctl). >> >> Yeah, it needs a get_user() that supports 64-bit data. >> > Hi Geert, > > I assume you mean m68k, where 64 bit support for get_user has been disabled. > > The problem on powerpc is different though: __get_user_nocheck() > and __get_user_check() use > unsigned long __gu_val; > followed by > __get_user_size(__gu_val, __gu_addr, (size), __gu_err); > > __get_user_size() fails in > if (size > sizeof(x)) > (x) = __get_user_bad(); > > Presumably "unsigned long" is 32 bit on 32 bit powerpc, not 64 bit. > > Overall, the explicit 64-bit use of get_user() seems to be quite unusual. I noticed you've sent a fix for DRM. Doh, and I was just fixing m68k... Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx 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-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
