[PATCH 4.14 26/44] ipv6: ila: select CONFIG_DST_CACHE

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4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann <arnd@xxxxxxxx>

[ Upstream commit 83ed7d1fe2d2d4a11b30660dec20168bb473d9c1 ]

My randconfig builds came across an old missing dependency for ILA:

ERROR: "dst_cache_set_ip6" [net/ipv6/ila/ila.ko] undefined!
ERROR: "dst_cache_get" [net/ipv6/ila/ila.ko] undefined!
ERROR: "dst_cache_init" [net/ipv6/ila/ila.ko] undefined!
ERROR: "dst_cache_destroy" [net/ipv6/ila/ila.ko] undefined!

We almost never run into this by accident because randconfig builds
end up selecting DST_CACHE from some other tunnel protocol, and this
one appears to be the only one missing the explicit 'select'.

>From all I can tell, this problem first appeared in linux-4.9
when dst_cache support got added to ILA.

Fixes: 79ff2fc31e0f ("ila: Cache a route to translated address")
Cc: Tom Herbert <tom@xxxxxxxxxxxxxxx>
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/ipv6/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/net/ipv6/Kconfig
+++ b/net/ipv6/Kconfig
@@ -109,6 +109,7 @@ config IPV6_MIP6
 config IPV6_ILA
 	tristate "IPv6: Identifier Locator Addressing (ILA)"
 	depends on NETFILTER
+	select DST_CACHE
 	select LWTUNNEL
 	---help---
 	  Support for IPv6 Identifier Locator Addressing (ILA).





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