damon_call() and damos_walk() can leak memory and/or deadlock when they
are called while the kdamond is terminating.  Fix those.

Changes from RFC v2
(https://lore.kernel.org/20260327004952.58266-1-sj@kernel.org)
- Update and wordsmith commit message.
- Add damos_walk() race fix.
Changes from RFC v1
(https://lore.kernel.org/20260326062347.88569-3-sj@kernel.org)
- Clarify damon_call() call condition.
- Init call_controls_obsolete before kdamond_started completion.
- Wordsmith commit message.
- Split out repeat_call_control leak fix from the series.

SeongJae Park (2):
  mm/damon/core: fix damon_call() vs kdamond_fn() exit race deadlock
  mm/damon/core: fix damos_walk() vs kdamond_fn() exit race deadlock

 include/linux/damon.h |  2 ++
 mm/damon/core.c       | 66 ++++++++++++++++++-------------------------
 2 files changed, 30 insertions(+), 38 deletions(-)


base-commit: 1f03f2e753209de7ef14a675a55453d74c9df5d2
-- 
2.47.3

Forwarding sashiko.dev review status for this thread.

# review url: https://sashiko.dev/#/patchset/20260327142605.4834-1-sj@kernel.org

- [RFC PATCH v3 1/2] mm/damon/core: fix damon_call() vs kdamond_fn() exit race deadlock
  - status: Reviewed
  - review: No issues found.
- [RFC PATCH v3 2/2] mm/damon/core: fix damos_walk() vs kdamond_fn() exit race deadlock
  - status: Pending
- [RFC PATCH v3 2/2] mm/damon/core: fix damos_walk() vs kdamond_fn() exit race deadlock
  - status: Reviewed
  - review: No issues found.

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