vfs: drop_file_write_access() made static

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/file_table.c b/fs/file_table.c
index 20002e3..70f2a0f 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -204,7 +204,7 @@
  * to write to @file, along with access to write through
  * its vfsmount.
  */
-void drop_file_write_access(struct file *file)
+static void drop_file_write_access(struct file *file)
 {
 	struct vfsmount *mnt = file->f_path.mnt;
 	struct dentry *dentry = file->f_path.dentry;
@@ -219,7 +219,6 @@
 	mnt_drop_write(mnt);
 	file_release_write(file);
 }
-EXPORT_SYMBOL_GPL(drop_file_write_access);
 
 /* the real guts of fput() - releasing the last reference to file
  */