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-rw-r--r--sysdeps/unix/sysv/linux/bits/mman-linux.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/bits/mman-linux.h b/sysdeps/unix/sysv/linux/bits/mman-linux.h
index 69ed247dbf..6c06069cdc 100644
--- a/sysdeps/unix/sysv/linux/bits/mman-linux.h
+++ b/sysdeps/unix/sysv/linux/bits/mman-linux.h
@@ -92,3 +92,10 @@
 # define POSIX_MADV_WILLNEED	3 /* Will need these pages.  */
 # define POSIX_MADV_DONTNEED	4 /* Don't need these pages.  */
 #endif
+
+/* Flags for `mlockall'.  */
+#ifndef MCL_CURRENT
+# define MCL_CURRENT	1		/* Lock all currently mapped pages.  */
+# define MCL_FUTURE	2		/* Lock all additions to address
+					   space.  */
+#endif