On Thu, May 11, 2017 at 04:42:08PM +0200, Paolo Bonzini wrote:
> diff --git a/block/accounting.c b/block/accounting.c
> index 0429e31c9f..85890e4fe5 100644
> --- a/block/accounting.c
> +++ b/block/accounting.c
> @@ -35,6 +35,7 @@ static const int qtest_latency_ns = NANOSECONDS_PER_SECOND / 1000;
>  void block_acct_init(BlockAcctStats *stats, bool account_invalid,
>                       bool account_failed)
>  {
> +    qemu_mutex_init(&stats->spin);

Only if you respin this series:

s/spin/lock/

(It's no longer a spinlock.)