tree a330444b01df40d2f4a403ee61fd0f33623e5949
parent e88f157de5e0b327b1b26e3260de4b16c07e2d19
author Anton Blanchard <anton@samba.org> 1414727245 +1100
committer Michael Ellerman <mpe@ellerman.id.au> 1415573971 +1100

powerpc: Don't use local named register variable in current_thread_info

LLVM doesn't support local named register variables and is unlikely
to. current_thread_info is using one, fix it by moving it out and
calling it __current_r1().

I gave it a bit of an obscure name because we don't want anyone else
using it - they should use current_stack_pointer(). This specific
case is performance critical and we can't afford to call a function
to get it. Furthermore it isn't important to know exactly where in
the stack we are since we mask the lower bits.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>