[PATCH 0/2] liveupdate: FLB refcounting improvements

[David Matlack <dmatlack@google.com>]

This series can be found on GitHub:

  https://github.com/dmatlack/linux/tree/liveupdate/flb/refcount/v1

This series has 2 patches to improve how FLB refcounting works in
preparation for using FLB in the PCI core. The first patch converts the
existing refcounting to use refcount_t, and the second patch allows
users of the incoming FLB to hold references to the FLB to avoid it
getting freed.

Users of the outgoing FLB don't need to take an extra reference yet
since it's always done in the context of a preserve/unpreserve file
callback, which are already synchronized with outgoing FLB creation
and destruction.

This series has been tested against the existing Live Update selftests
(liveupdate, luo_kexec_simple, and luo_multi_session) on an Intel EMR
host.


David Matlack (2):
  liveupdate: Use refcount_t for FLB reference counts
  liveupdate: Reference count incoming FLB data

 include/linux/liveupdate.h  |  9 ++++++-
 kernel/liveupdate/luo_flb.c | 52 ++++++++++++++++++-------------------
 lib/tests/liveupdate.c      |  3 +++
 3 files changed, 37 insertions(+), 27 deletions(-)


base-commit: 2a4c0c11c0193889446cdb6f1540cc2b9aff97dd
-- 
2.54.0.rc2.544.gc7ae2d5bb8-goog