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-rw-r--r--winsup/cygwin/include/cygwin/ipc.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/winsup/cygwin/include/cygwin/ipc.h b/winsup/cygwin/include/cygwin/ipc.h
index 90534c29d..d0f5beaa1 100644
--- a/winsup/cygwin/include/cygwin/ipc.h
+++ b/winsup/cygwin/include/cygwin/ipc.h
@@ -32,6 +32,9 @@ struct ipc_perm
/* Mode bits:
*/
+#ifdef _KERNEL
+#define IPC_KEY_IS_SHMID 0x0100 /* Used in shmget when called from shmat. */
+#endif
#define IPC_CREAT 0x0200 /* Create entry if key does not exist. */
#define IPC_EXCL 0x0400 /* Fail if key exists. */
#define IPC_NOWAIT 0x0800 /* Error if request must wait. */