linux-kernel - [PATCH] qdisc: constify meta_type

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Message-Id: <1460191762-10986-1-git-send-email-Julia.Lawall@lip6.fr>
Date:	Sat,  9 Apr 2016 10:49:22 +0200
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Jamal Hadi Salim <jhs@...atatu.com>
Cc:	kernel-janitors@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] qdisc: constify meta_type_ops structures

The meta_type_ops structures are never modified, so declare them as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
 net/sched/em_meta.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/sched/em_meta.c b/net/sched/em_meta.c
index f2aabc0..a309a07 100644
--- a/net/sched/em_meta.c
+++ b/net/sched/em_meta.c
@@ -796,7 +796,7 @@ struct meta_type_ops {
 	int	(*dump)(struct sk_buff *, struct meta_value *, int);
 };
 
-static struct meta_type_ops __meta_type_ops[TCF_META_TYPE_MAX + 1] = {
+static const struct meta_type_ops __meta_type_ops[TCF_META_TYPE_MAX + 1] = {
 	[TCF_META_TYPE_VAR] = {
 		.destroy = meta_var_destroy,
 		.compare = meta_var_compare,
@@ -812,7 +812,7 @@ static struct meta_type_ops __meta_type_ops[TCF_META_TYPE_MAX + 1] = {
 	}
 };
 
-static inline struct meta_type_ops *meta_type_ops(struct meta_value *v)
+static inline const struct meta_type_ops *meta_type_ops(struct meta_value *v)
 {
 	return &__meta_type_ops[meta_type(v)];
 }
@@ -870,7 +870,7 @@ static int em_meta_match(struct sk_buff *skb, struct tcf_ematch *m,
 static void meta_delete(struct meta_match *meta)
 {
 	if (meta) {
-		struct meta_type_ops *ops = meta_type_ops(&meta->lvalue);
+		const struct meta_type_ops *ops = meta_type_ops(&meta->lvalue);
 
 		if (ops && ops->destroy) {
 			ops->destroy(&meta->lvalue);
@@ -964,7 +964,7 @@ static int em_meta_dump(struct sk_buff *skb, struct tcf_ematch *em)
 {
 	struct meta_match *meta = (struct meta_match *) em->data;
 	struct tcf_meta_hdr hdr;
-	struct meta_type_ops *ops;
+	const struct meta_type_ops *ops;
 
 	memset(&hdr, 0, sizeof(hdr));
 	memcpy(&hdr.left, &meta->lvalue.hdr, sizeof(hdr.left));