From: Anthony Yznaga <anthony.yzn...@oracle.com> Date: Tue, 15 Aug 2017 17:45:12 -0700
> I compiled a kernel with gcc 7 and found that the compiler inserted a > call to __multi3() in mq_attr_ok(). The sparc64 implementation of > __multi3() was added by 1b4af13ff2cc specifically for gcc 7 and later, > but it clobbers %g4 and %g5. Not sure if that was intended but it > looks like __multi3() is not safe to call from kernel code. Good catch, we have to redo the register allocation in that routine to fix this.
