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| author | Nadia Derbey <Nadia.Derbey@bull.net> | 2007-10-18 23:40:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-19 11:53:46 -0700 |
| commit | 03f02c7657f7948ab980280c54c9366f962b1474 (patch) | |
| tree | 7b1f564772077db0aed1e3c5a79ae77d2c1d2307 /ipc/msg.c | |
| parent | 023a53557ea0e987b002e9a844242ef0b0aa1eb3 (diff) | |
| download | lwn-03f02c7657f7948ab980280c54c9366f962b1474.tar.gz lwn-03f02c7657f7948ab980280c54c9366f962b1474.zip | |
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.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/ipc/msg.c b/ipc/msg.c index 74e672035675..9f545826bcf5 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) |