test/udev-test.pl: suppress umount error message at startup

umount emits an error message "no mount point specified" if the
tmpfs isn't mounted yet, which is the normal case.
Suppress that by redirecting stderr.

diff --git a/test/udev-test.pl b/test/udev-test.pl
index 790387e68092499ebc8e7c1c789d24aa92563edc..5e362db6c55845ee7e7c7598f8ffb71d27c0f491 100755 (executable)
--- a/test/udev-test.pl
+++ b/test/udev-test.pl
@@ -2405,7 +2405,7 @@ sub major_minor_test {
 }
 
 sub udev_setup {
-        system("umount", $udev_tmpfs);
+        system("umount \"$udev_tmpfs\" 2>/dev/null");
         rmdir($udev_tmpfs);
         mkdir($udev_tmpfs) || die "unable to create udev_tmpfs: $udev_tmpfs\n";