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authorNadia Derbey <Nadia.Derbey@bull.net>2007-10-18 23:40:51 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-19 11:53:46 -0700
commit03f02c7657f7948ab980280c54c9366f962b1474 (patch)
tree7b1f564772077db0aed1e3c5a79ae77d2c1d2307 /ipc/msg.c
parent023a53557ea0e987b002e9a844242ef0b0aa1eb3 (diff)
downloadlinux-2.6.38-lt-ux500-03f02c7657f7948ab980280c54c9366f962b1474.tar.gz
Storing ipcs into IDRs
This patch converts casts of struct kern_ipc_perm to . struct msg_queue . struct sem_array . struct shmid_kernel into the equivalent container_of() macro. It improves code maintenance because the code need not change if kern_ipc_perm is no longer at the beginning of the containing struct. Signed-off-by: Nadia Derbey <Nadia.Derbey@bull.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc/msg.c')
-rw-r--r--ipc/msg.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/ipc/msg.c b/ipc/msg.c
index 74e67203567..9f545826bcf 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -138,13 +138,17 @@ void __init msg_init(void)
static inline struct msg_queue *msg_lock(struct ipc_namespace *ns, int id)
{
- return (struct msg_queue *) ipc_lock(&msg_ids(ns), id);
+ struct kern_ipc_perm *ipcp = ipc_lock(&msg_ids(ns), id);
+
+ return container_of(ipcp, struct msg_queue, q_perm);
}
static inline struct msg_queue *msg_lock_check(struct ipc_namespace *ns,
int id)
{
- return (struct msg_queue *) ipc_lock_check(&msg_ids(ns), id);
+ struct kern_ipc_perm *ipcp = ipc_lock_check(&msg_ids(ns), id);
+
+ return container_of(ipcp, struct msg_queue, q_perm);
}
static inline void msg_rmid(struct ipc_namespace *ns, struct msg_queue *s)
@@ -274,9 +278,11 @@ static void freeque(struct ipc_namespace *ns, struct msg_queue *msq)
ipc_rcu_putref(msq);
}
-static inline int msg_security(void *msq, int msgflg)
+static inline int msg_security(struct kern_ipc_perm *ipcp, int msgflg)
{
- return security_msg_queue_associate((struct msg_queue *) msq, msgflg);
+ struct msg_queue *msq = container_of(ipcp, struct msg_queue, q_perm);
+
+ return security_msg_queue_associate(msq, msgflg);
}
asmlinkage long sys_msgget(key_t key, int msgflg)