Hi Paolo, could you please take a look? If you don't like my patch I will be happy if you suggest your solution for this problem. We can help with reviewing it.
I grepped through the QEMU sources and found timer_del is called from a separate thread in accel/tcg/tcg-accel-ops-rr.c. It does not use the opaque pointer, so this is not exactly the same issue I sent the patch for, but QEMU already has timer_del inside a separate thread. Another solution (to adding timer_join) here could be guaranteeing that the timer callback will not fire after timer_del is called. This would be beneficial for accel/tcg/tcg-accel-ops-rr.c. Regards, Roman.
