diff options
| -rw-r--r-- | ipc/util.c | 4 | ||||
| -rw-r--r-- | ipc/util.h | 2 |
2 files changed, 4 insertions, 2 deletions
diff --git a/ipc/util.c b/ipc/util.c index 9b0c4e7753a..c51c96f2e0c 100644 --- a/ipc/util.c +++ b/ipc/util.c @@ -413,7 +413,7 @@ int ipcget_public(struct ipc_namespace *ns, struct ipc_ids *ids, void ipc_rmid(struct ipc_ids *ids, struct kern_ipc_perm *ipcp) { - int lid = ipcp->id % SEQ_MULTIPLIER; + int lid = ipcid_to_idx(ipcp->id); idr_remove(&ids->ipcs_idr, lid); @@ -672,7 +672,7 @@ void ipc64_perm_to_ipc_perm (struct ipc64_perm *in, struct ipc_perm *out) struct kern_ipc_perm *ipc_lock(struct ipc_ids *ids, int id) { struct kern_ipc_perm *out; - int lid = id % SEQ_MULTIPLIER; + int lid = ipcid_to_idx(id); rcu_read_lock(); out = idr_find(&ids->ipcs_idr, lid); diff --git a/ipc/util.h b/ipc/util.h index 2a03d8cc6a0..fa7e7a07486 100644 --- a/ipc/util.h +++ b/ipc/util.h @@ -79,6 +79,8 @@ void __init ipc_init_proc_interface(const char *path, const char *header, #define IPC_MSG_IDS 1 #define IPC_SHM_IDS 2 +#define ipcid_to_idx(id) ((id) % SEQ_MULTIPLIER) + /* must be called with ids->mutex acquired.*/ int ipc_addid(struct ipc_ids *, struct kern_ipc_perm *, int); int ipc_get_maxid(struct ipc_ids *); |