vfs: add support for a lazytime mount option

[cascardo/linux.git] / include / uapi / linux / fs.h

diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index 3735fa0..9b964a5 100644 (file)
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -90,6 +90,7 @@ struct inodes_stat_t {
 #define MS_KERNMOUNT   (1<<22) /* this is a kern_mount call */
 #define MS_I_VERSION   (1<<23) /* Update inode I_version field */
 #define MS_STRICTATIME (1<<24) /* Always perform atime updates */
+#define MS_LAZYTIME    (1<<25) /* Update the on-disk [acm]times lazily */
 
 /* These sb flags are internal to the kernel */
 #define MS_NOSEC       (1<<28)
@@ -100,7 +101,8 @@ struct inodes_stat_t {
 /*
  * Superblock flags that can be altered by MS_REMOUNT
  */
-#define MS_RMT_MASK    (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION)
+#define MS_RMT_MASK    (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION|\
+                        MS_LAZYTIME)
 
 /*
  * Old magic mount flag and mask