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
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