netlink: Move netlink attribute parsing support to lib

Netlink attribute parsing may be used even if CONFIG_NET is not set.
Move it from net/netlink to lib and control its inclusion based on the new
config symbol CONFIG_NLATTR, which is selected by CONFIG_NET.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

5 files changed, 10 insertions, 1 deletions

diff --git a/lib/Kconfig b/lib/Kconfig
index 03c2c24b9083..cea9e30a88ff 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -174,4 +174,10 @@ config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
        bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
        depends on EXPERIMENTAL && BROKEN
 
+#
+# Netlink attribute parsing support is select'ed if needed
+#
+config NLATTR
+        bool
+
 endmenu
diff --git a/lib/Makefile b/lib/Makefile
index 32b0e64ded27..b2c09da02cae 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -84,6 +84,8 @@ obj-$(CONFIG_HAVE_ARCH_TRACEHOOK) += syscall.o
 
 obj-$(CONFIG_DYNAMIC_PRINTK_DEBUG) += dynamic_printk.o
 
+obj-$(CONFIG_NLATTR) += nlattr.o
+
 hostprogs-y     := gen_crc32table
 clean-files     := crc32table.h
 
diff --git a/net/netlink/attr.c b/lib/nlattr.c
index 56c3ce7fe29a..56c3ce7fe29a 100644
--- a/net/netlink/attr.c
+++ b/lib/nlattr.c
diff --git a/net/Kconfig b/net/Kconfig
index cdb8fdef6c4a..eab40a481356 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -4,6 +4,7 @@
 
 menuconfig NET
         bool "Networking support"
+        select NLATTR
         ---help---
           Unless you really know what you are doing, you should say Y here.
           The reason is that some programs need kernel networking support even
diff --git a/net/netlink/Makefile b/net/netlink/Makefile
index e3589c2de49e..bdd6ddf4e95b 100644
--- a/net/netlink/Makefile
+++ b/net/netlink/Makefile
@@ -2,4 +2,4 @@
 # Makefile for the netlink driver.
 #
 
-obj-y                           := af_netlink.o attr.o genetlink.o
+obj-y                           := af_netlink.o genetlink.o