This taken from a security series (hence partially reviewed already), and
thought it only applied to a forthcoming selftest, but then Ayan posted a
truncated example to Matrix.

Patch 1 should be considered for 4.20 at this point.  Patches 2 and 3 can
definitely wait until 4.21 opens.

Andrew Cooper (3):
  xen/console: Fix truncation of panic() messages
  xen/console: Optimise parameter order of vprintk_common()
  xen/ACPI: Drop local acpi_os_{v,}printf() and use plain {v,}printk()

 xen/drivers/acpi/osl.c      | 17 -----------------
 xen/drivers/char/console.c  | 25 +++++++++++++++----------
 xen/include/acpi/acpiosxf.h |  5 ++---
 xen/include/xen/lib.h       |  2 ++
 4 files changed, 19 insertions(+), 30 deletions(-)


base-commit: 414dde38b0cf8a38230c8c3f9e8564da9762e743
-- 
2.39.5