[dpdk-dev] [PATCH V4 5/9] bus: add helper to handle sigbus

[Ananyev, Konstantin]

> +int
> +rte_bus_sigbus_handler(const void *failure_addr)
> +{
> +	struct rte_bus *bus;
> +	int old_errno = rte_errno;
> +	int ret = 0;
> +
> +	rte_errno = 0;
> +
> +	bus = rte_bus_find(NULL, bus_handle_sigbus, failure_addr);
> +	if (bus == NULL) {
> +		RTE_LOG(ERR, EAL, "No bus can handle the sigbus error!");
> +		ret = -1;
> +	} else if (rte_errno != 0) {
> +		RTE_LOG(ERR, EAL, "Failed to handle the sigbus error!");
> +		ret = -1;
> +	}
> +
> +	/* if sigbus not be handled, return back old errno. */
> +	if (ret)
> +		rte_errno = old_errno;

Hmm, not sure why we need to set/restore rte_errno here?

> +
> +	return ret;
> +}