On Wed, Mar 16, 2016 at 02:59:38PM +0100, Arnd Bergmann wrote:

On Wednesday 16 March 2016 13:12:36 Andy Shevchenko wrote:

quoted

quoted

I've also sent a patch that fixes the link error on ARM and that should
work on all other architectures too.

In case of avr32 signalfd_read() fails. Does your patch help with it as well?

P.S. Bisecting shows same culprit: 150a0b4905f1 ("aio: add support for
async openat()")

I don't know. What is the symptom on avr32? My patch only removes the
get_user() instances on 64-bit values and replaces them with a
single copy_from_user() call.

Which is the wrong fix.  Arch code should be able to handle 64 bit values 
in all the get/put_user() variants.  We use 64 bit variables all over the 
place in interfaces to userspace.

		-ben