1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 51bd9370d43..965b9ba3865 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -81,6 +81,14 @@ extern int dir_notify_enable;
 #define FMODE_WRITE_IOCTL       ((__force fmode_t)128)
 #define FMODE_NDELAY_NOW        ((__force fmode_t)256)
 
+/*
+ * Don't update ctime and mtime.
+ *
+ * Currently a special hack for the XFS open_by_handle ioctl, but we'll
+ * hopefully graduate it to a proper O_CMTIME flag supported by open(2) soon.
+ */
+#define FMODE_NOCMTIME          ((__force fmode_t)2048)
+
 #define RW_MASK         1
 #define RWA_MASK        2
 #define READ 0