net: dsa/slave: Fix compilation warnings

Currently when none of CONFIG_NET_DSA_TAG_DSA, CONFIG_NET_DSA_TAG_EDSA and
CONFIG_NET_DSA_TAG_TRAILER is defined, we get following compilation warnings:

net/dsa/slave.c:51:12: warning: 'dsa_slave_init' defined but not used [-Wunused-function]
net/dsa/slave.c:60:12: warning: 'dsa_slave_open' defined but not used [-Wunused-function]
net/dsa/slave.c:98:12: warning: 'dsa_slave_close' defined but not used [-Wunused-function]
net/dsa/slave.c:116:13: warning: 'dsa_slave_change_rx_flags' defined but not used [-Wunused-function]
net/dsa/slave.c:127:13: warning: 'dsa_slave_set_rx_mode' defined but not used [-Wunused-function]
net/dsa/slave.c:136:12: warning: 'dsa_slave_set_mac_address' defined but not used [-Wunused-function]
net/dsa/slave.c:164:12: warning: 'dsa_slave_ioctl' defined but not used [-Wunused-function]

Earlier approach to fix this was discussed here:

lkml.org/lkml/2012/10/29/549

This is another approach to fix it. This is done by some changes in config
options, which make more sense than the earlier approach. As, atleast one
tagging option must always be selected for using net/dsa/ infrastructure, this
patch selects NET_DSA from tagging configs instead of having it as an selectable
config.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 7 deletions

diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig
index 274791cd7a35..0f5dc344ed92 100644
--- a/net/dsa/Kconfig
+++ b/net/dsa/Kconfig
@@ -1,5 +1,5 @@
 config NET_DSA
-        tristate "Distributed Switch Architecture support"
+        tristate
         default n
         depends on EXPERIMENTAL && NETDEVICES && !S390
         select PHYLIB
@@ -8,19 +8,21 @@ config NET_DSA
           the Distributed Switch Architecture.
 
 
-if NET_DSA
+menu "Distributed Switch Architecture support"
 
 # tagging formats
 config NET_DSA_TAG_DSA
-        bool
+        bool "Original DSA packet tagging format"
+        select NET_DSA
         default n
 
 config NET_DSA_TAG_EDSA
-        bool
+        bool "Ethertype DSA packet tagging format"
+        select NET_DSA
         default n
 
 config NET_DSA_TAG_TRAILER
-        bool
+        bool "Trailer DSA packet tagging format"
+        select NET_DSA
         default n
-
-endif
+endmenu