Description of problem:

We use a variable of type int to store a uint32_t variable.
This variable is send through the wire and between kernel/userland.

Analysis:
- kernel declares int mp_state;
- kernel transfers to/from userspace over ioctl _u32 mp_state.
- qemu stores internall int mp_state.
- qemu saves/load during migration uint32_t mp_state.

qemu don't use that variable at all, just save it for migration.
Changing it to uint32_t will make everything working


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