Re: [PATCH v2] ip_tunnel: enclose a code block in macro IS_ENABLED(CONFIG_IPV6)

On Tue, 2016-05-24 at 10:39 +0800, Haishuang Yan wrote:

For ipv6 case, enclose the code block in macro IS_ENABLED(CONFIG_IPV6).

---
Changes in v2:
  - Place the "#if IS_ENABLED" block before the "} else if
(..) {" piece and the "#endif" before the closing brace and this
becomes much easier to look at.

_Why_ is this patch needed ?

Please describe in the changelog what _actual_ problem you are trying to
address.

We have many points in the kernel using ipv6_get_dsfield() even if
CONFIG_IPV6=n, and it seems fine to me at least.

Thanks.