2 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index d449e632e6a0..8e2da1e06e3b 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -61,6 +61,7 @@ ata *);
         ssize_t (*listxattr) (struct dentry *, char *, size_t);
         int (*removexattr) (struct dentry *, const char *);
         int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len);
+        void (*update_time)(struct inode *, struct timespec *, int);
 
 locking rules:
         all may block
@@ -87,6 +88,8 @@ getxattr:	no
 listxattr:      no
 removexattr:    yes
 fiemap:         no
+update_time:    no
+
         Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on
 victim.
         cross-directory ->rename() has (per-superblock) ->s_vfs_rename_sem.
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index ef19f91a0f12..efd23f481704 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -363,6 +363,7 @@ struct inode_operations {
         ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
         ssize_t (*listxattr) (struct dentry *, char *, size_t);
         int (*removexattr) (struct dentry *, const char *);
+        void (*update_time)(struct inode *, struct timespec *, int);
 };
 
 Again, all methods are called without any locks being held, unless
@@ -471,6 +472,9 @@ otherwise noted.
   removexattr: called by the VFS to remove an extended attribute from
         a file. This method is called by removexattr(2) system call.
 
+  update_time: called by the VFS to update a specific time or the i_version of
+        an inode.  If this is not defined the VFS will update the inode itself
+        and call mark_inode_dirty_sync.
 
 The Address Space Object
 ========================