[NET_SCHED]: mark classifier ops __read_mostly

Additionally remove unnecessary NULL initilizations of the next pointer.
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sched/cls_api.c

@@ -31,7 +31,7 @@
 
 /* The list of all installed classifier types */
 
-static struct tcf_proto_ops *tcf_proto_base;
+static struct tcf_proto_ops *tcf_proto_base __read_mostly;
 
 /* Protects list of registered TC modules. It is pure SMP lock. */
 static DEFINE_RWLOCK(cls_mod_lock);

net/sched/cls_basic.c

@@ -271,7 +271,7 @@ static int basic_dump(struct tcf_proto *tp, unsigned long fh,
 	return -1;
 }
 
-static struct tcf_proto_ops cls_basic_ops = {
+static struct tcf_proto_ops cls_basic_ops __read_mostly = {
 	.kind		=	"basic",
 	.classify	=	basic_classify,
 	.init		=	basic_init,

net/sched/cls_fw.c

@@ -370,8 +370,7 @@ static int fw_dump(struct tcf_proto *tp, unsigned long fh,
 	return -1;
 }
 
-static struct tcf_proto_ops cls_fw_ops = {
-	.next		=	NULL,
+static struct tcf_proto_ops cls_fw_ops __read_mostly = {
 	.kind		=	"fw",
 	.classify	=	fw_classify,
 	.init		=	fw_init,

net/sched/cls_route.c

@@ -590,8 +590,7 @@ static int route4_dump(struct tcf_proto *tp, unsigned long fh,
 	return -1;
 }
 
-static struct tcf_proto_ops cls_route4_ops = {
-	.next		=	NULL,
+static struct tcf_proto_ops cls_route4_ops __read_mostly = {
 	.kind		=	"route",
 	.classify	=	route4_classify,
 	.init		=	route4_init,

net/sched/cls_tcindex.c

@@ -485,8 +485,7 @@ static int tcindex_dump(struct tcf_proto *tp, unsigned long fh,
 	return -1;
 }
 
-static struct tcf_proto_ops cls_tcindex_ops = {
-	.next		=	NULL,
+static struct tcf_proto_ops cls_tcindex_ops __read_mostly = {
 	.kind		=	"tcindex",
 	.classify	=	tcindex_classify,
 	.init		=	tcindex_init,

net/sched/cls_u32.c

@@ -751,8 +751,7 @@ static int u32_dump(struct tcf_proto *tp, unsigned long fh,
 	return -1;
 }
 
-static struct tcf_proto_ops cls_u32_ops = {
-	.next		=	NULL,
+static struct tcf_proto_ops cls_u32_ops __read_mostly = {
 	.kind		=	"u32",
 	.classify	=	u32_classify,
 	.init		=	u32_init,