[PATCH v4 0/2] s390: Warn if kernel command line contains non-printable EBCDIC characters

[Ilya Leoshkevich]

v3: https://lore.kernel.org/linux-s390/20260828140057.1728173-1-iii@xxxxxxxxxxxxx/
v3 -> v4: Switch to ASCII subset of EBCDIC (Sashiko, Heiko).
          Add and use isspace_ebc_asc() to satisfy Heiko's comment
          about newlines in v1.

v2: https://lore.kernel.org/all/20260826150702.949956-1-iii@xxxxxxxxxxxxx/
v2 -> v3: Check whether source EBCDIC characters are printable
          (David, Heiko).

v1: https://lore.kernel.org/all/20260825150840.537653-1-iii@xxxxxxxxxxxxx/
v1 -> v2: Account for newlines (Heiko).
          Minor stylistic improvements: inline int i, bool return type,
          comment modality.

Hi,

This series adds a warning for unintentional EBCDIC -> ASCII kernel
command line translations. Patch 1 adds EBCDIC character classes.
Patch 2 uses them for determining whether the command line is
printable.

Best regards,
Ilya

Ilya Leoshkevich (2):
  s390/ebcdic: Add character classes for the ASCII subset of EBCDIC
  s390: Warn if kernel command line contains non-printable EBCDIC
    characters

 arch/s390/boot/ipl_parm.c      | 13 ++++++++++-
 arch/s390/include/asm/ebcdic.h |  6 +++++
 arch/s390/kernel/ebcdic.c      | 40 +++++++++++++++++++++++++++++++++-
 3 files changed, 57 insertions(+), 2 deletions(-)

-- 
2.55.0