glibc 2.21 - Master is frozen solid at -26 degC.

[David Miller]

From: "Carlos O'Donell" <carlos@redhat.com>
Date: Wed, 28 Jan 2015 16:29:58 -0500

> The pure 32-bit sparc port does not use any volatile register variables
> that I can see.

I explained what's happening in a reply to Roland earlier.  We're
doing atomics on &something->foo where 'foo' is volatile, and the
sparc macros use typeof() on the arguments to declare register
variables, and that's how we end up with these warnings.