Comment about the validity of errno.

diff --git a/lib/mountlist.c b/lib/mountlist.c
index 096593f..9051e81 100644 (file)
--- a/lib/mountlist.c
+++ b/lib/mountlist.c
@@ -612,6 +612,7 @@ read_filesystem_list (int need_fs_type)
 
     if (ferror (fp))
       {
+       /* The last fread() call must have failed.  */
        int saved_errno = errno;
        fclose (fp);
        errno = saved_errno;