FSR_CEXC_MASK
fpt->thread.fsr &= ~(0x3000 | FSR_CEXC_MASK);
fsr &= ~(FSR_CEXC_MASK);
fsr &= ~(FSR_CEXC_MASK);
current_thread_info()->xfsr[0] &= ~(FSR_CEXC_MASK);
current_thread_info()->xfsr[0] &= ~(FSR_CEXC_MASK);