We're missing this in xfstests:

ommit 83e1f4c43817aa0fa4419c1f9591b45b7f42de9f
Author: Nirjhar Roy (IBM) <nirjhar.roy.lists@gmail.com>
Date:   Tue Mar 4 13:48:16 2025 +0000

    xfs/539: Ignore remount failures on v5 xfs
    
    Remount with noattr2 fails on a v5 filesystem, however the deprecation
    warnings still get printed and that is exactly what the test
    is checking. So ignore the mount failures in this case.
    
    Signed-off-by: Nirjhar Roy (IBM) <nirjhar.roy.lists@gmail.com>
    Reviewed-by: Pavel Reichl <preichl@redhat.com>
    Signed-off-by: Zorro Lang <zlang@kernel.org>

diff --git a/tests/xfs/539 b/tests/xfs/539
index b9bb7cc1..5098be4a 100755
— a/tests/xfs/539
+++ b/tests/xfs/539
@@ -61,7 +61,7 @@ for VAR in {attr2,noikeep}; do
 done
 for VAR in {noattr2,ikeep}; do
        log_tag

•       _scratch_remount $VAR
  +       _scratch_remount $VAR >> $seqres.full 2>&1
          check_dmesg_for_since_tag "XFS: $VAR mount option is deprecated" || \
                  echo "Could not find deprecation warning for $VAR"
   done