1 files changed, 12 insertions, 4 deletions

diff --git a/fs/libfs.c b/fs/libfs.c
index bd50b11f92da..8f2271a5df53 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -905,21 +905,29 @@ EXPORT_SYMBOL_GPL(generic_fh_to_parent);
  * filesystems which track all non-inode metadata in the buffers list
  * hanging off the address_space structure.
  */
-int generic_file_fsync(struct file *file, int datasync)
+int generic_file_fsync(struct file *file, loff_t start, loff_t end,
+                       int datasync)
 {
         struct inode *inode = file->f_mapping->host;
         int err;
         int ret;
 
+        err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (err)
+                return err;
+
+        mutex_lock(&inode->i_mutex);
         ret = sync_mapping_buffers(inode->i_mapping);
         if (!(inode->i_state & I_DIRTY))
-                return ret;
+                goto out;
         if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
-                return ret;
+                goto out;
 
         err = sync_inode_metadata(inode, 1);
         if (ret == 0)
                 ret = err;
+out:
+        mutex_unlock(&inode->i_mutex);
         return ret;
 }
 EXPORT_SYMBOL(generic_file_fsync);
@@ -956,7 +964,7 @@ EXPORT_SYMBOL(generic_check_addressable);
 /*
  * No-op implementation of ->fsync for in-memory filesystems.
  */
-int noop_fsync(struct file *file, int datasync)
+int noop_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
         return 0;
 }