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-rw-r--r--tools/testing/selftests/filesystems/overlayfs/wrappers.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/testing/selftests/filesystems/overlayfs/wrappers.h b/tools/testing/selftests/filesystems/overlayfs/wrappers.h
index c38bc48e0cfa..b9b090ef47b4 100644
--- a/tools/testing/selftests/filesystems/overlayfs/wrappers.h
+++ b/tools/testing/selftests/filesystems/overlayfs/wrappers.h
@@ -9,6 +9,10 @@
#include <linux/mount.h>
#include <sys/syscall.h>
+#ifndef STATX_MNT_ID_UNIQUE
+#define STATX_MNT_ID_UNIQUE 0x00004000U /* Want/got extended stx_mount_id */
+#endif
+
static inline int sys_fsopen(const char *fsname, unsigned int flags)
{
return syscall(__NR_fsopen, fsname, flags);