X-Git-Url: http://git.agner.ch/gitweb/?a=blobdiff_plain;f=ipc%2Futil.h;h=9c47d6f6c7b4b6c63b05b8a7c246ea3efcdeb0dc;hb=daf948c7d1a080041ae19aca07625efec670695a;hp=d64db3e56f7d0457488489be7acf13f430229ccd;hpb=8dc5cd04f97b5d6cad64df1e7dc5c49110b4d5e3;p=linux.git

diff --git a/ipc/util.h b/ipc/util.h
index d64db3e56f7d..9c47d6f6c7b4 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -100,6 +100,7 @@ void __init ipc_init_proc_interface(const char *path, const char *header,
 
 #define ipcid_to_idx(id) ((id) % SEQ_MULTIPLIER)
 #define ipcid_to_seqx(id) ((id) / SEQ_MULTIPLIER)
+#define IPCID_SEQ_MAX min_t(int, INT_MAX/SEQ_MULTIPLIER, USHRT_MAX)
 
 /* must be called with ids->rwsem acquired for writing */
 int ipc_addid(struct ipc_ids *, struct kern_ipc_perm *, int);