diff options
| 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/shm.c | |
| parent | 023a53557ea0e987b002e9a844242ef0b0aa1eb3 (diff) | |
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/shm.c')
| -rw-r--r-- | ipc/shm.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/ipc/shm.c b/ipc/shm.c index 8241264941a2..e2de16efe10d 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -139,13 +139,17 @@ void __init shm_init (void) static inline struct shmid_kernel *shm_lock(struct ipc_namespace *ns, int id) { - return (struct shmid_kernel *) ipc_lock(&shm_ids(ns), id); + struct kern_ipc_perm *ipcp = ipc_lock(&shm_ids(ns), id); + + return container_of(ipcp, struct shmid_kernel, shm_perm); } static inline struct shmid_kernel *shm_lock_check(struct ipc_namespace *ns, int id) { - return (struct shmid_kernel *) ipc_lock_check(&shm_ids(ns), id); + struct kern_ipc_perm *ipcp = ipc_lock_check(&shm_ids(ns), id); + + return container_of(ipcp, struct shmid_kernel, shm_perm); } static inline void shm_rmid(struct ipc_namespace *ns, struct shmid_kernel *s) @@ -424,14 +428,21 @@ no_file: return error; } -static inline int shm_security(void *shp, int shmflg) +static inline int shm_security(struct kern_ipc_perm *ipcp, int shmflg) { - return security_shm_associate((struct shmid_kernel *) shp, shmflg); + struct shmid_kernel *shp; + + shp = container_of(ipcp, struct shmid_kernel, shm_perm); + return security_shm_associate(shp, shmflg); } -static inline int shm_more_checks(void *shp, struct ipc_params *params) +static inline int shm_more_checks(struct kern_ipc_perm *ipcp, + struct ipc_params *params) { - if (((struct shmid_kernel *)shp)->shm_segsz < params->u.size) + struct shmid_kernel *shp; + + shp = container_of(ipcp, struct shmid_kernel, shm_perm); + if (shp->shm_segsz < params->u.size) return -EINVAL; return 0; |