While investigating an ext4/053 fstest failure, I realised that there was an issue when the flag 'fs_param_can_be_empty' is set in a parameter and it doesn't have a value After an initial attempt to fix the issue, Christian suggested a different approach and the following patches are based in his suggestion. Another change that I'm introducing in this v2 is the change of parameter 'test_dummy_encryption' to also use the new helper introduced by the first patch in this series. Finally, I'd like to ask someone to look closer at the overlayfs patch as I don't think there were any fstests to validate the case where 'lowerdir' is empty. Luis Henriques (3): fs_parser: add helper to define parameters with string and flag types ext4: fix the parsing of empty string mount parameters ovl: fix the parsing of empty string mount parameters fs/ext4/super.c | 25 ++++++++++--------------- fs/overlayfs/params.c | 13 +++++-------- include/linux/fs_parser.h | 8 ++++++++ 3 files changed, 23 insertions(+), 23 deletions(-)