On 01/15/2015 02:12 AM, Geert Uytterhoeven wrote:
On Mon, Jan 12, 2015 at 6:59 PM, Guenter Roeck <[email protected]> wrote:Build failures, seen since next-20150109: m68k:allmodconfig powerpc:ppc6xx_defconfigIt 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...
Sorry, should have Cc:'d you. Guenter -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
