ipc: add sysctl to specify desired next object id

[linux-2.6-block.git] / ipc / util.h

diff --git a/ipc/util.h b/ipc/util.h
index c8fe2f7631e9b616177d69c8ac614e901db669d2..a61e0ca2bffd05c0d3d5dd390df95e140a4b4186 100644 (file)
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -92,6 +92,7 @@ void __init ipc_init_proc_interface(const char *path, const char *header,
 #define IPC_SHM_IDS    2
 
 #define ipcid_to_idx(id) ((id) % SEQ_MULTIPLIER)
+#define ipcid_to_seqx(id) ((id) / SEQ_MULTIPLIER)
 
 /* must be called with ids->rw_mutex acquired for writing */
 int ipc_addid(struct ipc_ids *, struct kern_ipc_perm *, int);