diff options
| -rw-r--r-- | ipc/shm.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/ipc/shm.c b/ipc/shm.c index c6b4ad5ce3b..216ae727a93 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -124,6 +124,26 @@ void __init shm_init (void) IPC_SHM_IDS, sysvipc_shm_proc_show); } +static inline struct shmid_kernel *shm_obtain_object(struct ipc_namespace *ns, int id) +{ + struct kern_ipc_perm *ipcp = ipc_obtain_object(&shm_ids(ns), id); + + if (IS_ERR(ipcp)) + return ERR_CAST(ipcp); + + return container_of(ipcp, struct shmid_kernel, shm_perm); +} + +static inline struct shmid_kernel *shm_obtain_object_check(struct ipc_namespace *ns, int id) +{ + struct kern_ipc_perm *ipcp = ipc_obtain_object_check(&shm_ids(ns), id); + + if (IS_ERR(ipcp)) + return ERR_CAST(ipcp); + + return container_of(ipcp, struct shmid_kernel, shm_perm); +} + /* * shm_lock_(check_) routines are called in the paths where the rw_mutex * is not necessarily held. |