5 files changed, 19 insertions, 20 deletions

diff --git a/ipc/msg.c b/ipc/msg.c
index 6498531..35e4018 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -306,15 +306,14 @@ static inline int msg_security(struct kern_ipc_perm *ipcp, int msgflg)
 SYSCALL_DEFINE2(msgget, key_t, key, int, msgflg)
 {
 	struct ipc_namespace *ns;
-	struct ipc_ops msg_ops;
+	static const struct ipc_ops msg_ops = {
+		.getnew = newque,
+		.associate = msg_security,
+	};
 	struct ipc_params msg_params;
 
 	ns = current->nsproxy->ipc_ns;
 
-	msg_ops.getnew = newque;
-	msg_ops.associate = msg_security;
-	msg_ops.more_checks = NULL;
-
 	msg_params.key = key;
 	msg_params.flg = msgflg;
 
diff --git a/ipc/sem.c b/ipc/sem.c
index bee5554..3fcbc96 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -564,7 +564,11 @@ static inline int sem_more_checks(struct kern_ipc_perm *ipcp,
 SYSCALL_DEFINE3(semget, key_t, key, int, nsems, int, semflg)
 {
 	struct ipc_namespace *ns;
-	struct ipc_ops sem_ops;
+	static const struct ipc_ops sem_ops = {
+		.getnew = newary,
+		.associate = sem_security,
+		.more_checks = sem_more_checks,
+	};
 	struct ipc_params sem_params;
 
 	ns = current->nsproxy->ipc_ns;
@@ -572,10 +576,6 @@ SYSCALL_DEFINE3(semget, key_t, key, int, nsems, int, semflg)
 	if (nsems < 0 || nsems > ns->sc_semmsl)
 		return -EINVAL;
 
-	sem_ops.getnew = newary;
-	sem_ops.associate = sem_security;
-	sem_ops.more_checks = sem_more_checks;
-
 	sem_params.key = key;
 	sem_params.flg = semflg;
 	sem_params.u.nsems = nsems;
diff --git a/ipc/shm.c b/ipc/shm.c
index 7645961..b54c93f 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -609,15 +609,15 @@ static inline int shm_more_checks(struct kern_ipc_perm *ipcp,
 SYSCALL_DEFINE3(shmget, key_t, key, size_t, size, int, shmflg)
 {
 	struct ipc_namespace *ns;
-	struct ipc_ops shm_ops;
+	static const struct ipc_ops shm_ops = {
+		.getnew = newseg,
+		.associate = shm_security,
+		.more_checks = shm_more_checks,
+	};
 	struct ipc_params shm_params;
 
 	ns = current->nsproxy->ipc_ns;
 
-	shm_ops.getnew = newseg;
-	shm_ops.associate = shm_security;
-	shm_ops.more_checks = shm_more_checks;
-
 	shm_params.key = key;
 	shm_params.flg = shmflg;
 	shm_params.u.size = size;
diff --git a/ipc/util.c b/ipc/util.c
index 2eb0d1e..9b3fa38 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -317,7 +317,7 @@ int ipc_addid(struct ipc_ids *ids, struct kern_ipc_perm *new, int size)
  * when the key is IPC_PRIVATE.
  */
 static int ipcget_new(struct ipc_namespace *ns, struct ipc_ids *ids,
-		struct ipc_ops *ops, struct ipc_params *params)
+		const struct ipc_ops *ops, struct ipc_params *params)
 {
 	int err;
 
@@ -344,7 +344,7 @@ static int ipcget_new(struct ipc_namespace *ns, struct ipc_ids *ids,
  */
 static int ipc_check_perms(struct ipc_namespace *ns,
 			   struct kern_ipc_perm *ipcp,
-			   struct ipc_ops *ops,
+			   const struct ipc_ops *ops,
 			   struct ipc_params *params)
 {
 	int err;
@@ -375,7 +375,7 @@ static int ipc_check_perms(struct ipc_namespace *ns,
  * On success, the ipc id is returned.
  */
 static int ipcget_public(struct ipc_namespace *ns, struct ipc_ids *ids,
-		struct ipc_ops *ops, struct ipc_params *params)
+		const struct ipc_ops *ops, struct ipc_params *params)
 {
 	struct kern_ipc_perm *ipcp;
 	int flg = params->flg;
@@ -678,7 +678,7 @@ out:
  * Common routine called by sys_msgget(), sys_semget() and sys_shmget().
  */
 int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids,
-			struct ipc_ops *ops, struct ipc_params *params)
+			const struct ipc_ops *ops, struct ipc_params *params)
 {
 	if (params->key == IPC_PRIVATE)
 		return ipcget_new(ns, ids, ops, params);
diff --git a/ipc/util.h b/ipc/util.h
index 9c47d6f..e1153ad 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -201,7 +201,7 @@ static inline bool ipc_valid_object(struct kern_ipc_perm *perm)
 
 struct kern_ipc_perm *ipc_obtain_object_check(struct ipc_ids *ids, int id);
 int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids,
-			struct ipc_ops *ops, struct ipc_params *params);
+			const struct ipc_ops *ops, struct ipc_params *params);
 void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids,
 		void (*free)(struct ipc_namespace *, struct kern_ipc_perm *));
 #endif