On Thu, 2012-06-21 at 21:13 +0930, Alan Modra wrote:

On Thu, Jun 21, 2012 at 08:18:39PM +0930, Alan Modra wrote:

quoted

Linker bug.  That's not a sibling call, but a normal function return
via an out-of-line register restore function.

I couldn't see how this might be occurring, then I remembered the
kernel has this horrible practise of using ld -r to package object
files.  So linker generated functions might be munged together with
other functions.  Does this help?  (It won't if the kernel is
providing its own save/restore functions.)

The kernel does provide its own AIUI.

cheers