[PATCH 0/3] EDITME: cover title for b4/kunit-user-alloc

[Brendan Jackman <jackmanb@google.com>]

kunit_attach_mm() leaks an mm_struct (verified with dumb printf
debugging). Fix that. In the process, add a new kthread mm operation,
and clean up some nearby cleanup code in the KUnit lib.

---
Here's how I understand mm refcounts:

  funcs             | counter  | manages lifecycle of...
  --------------------------------------------------------
  mmgrab()/mmdrop() | mm_count | mm_struct and PGD
  --------------------------------------------------------
  mmget()/mmput()   | mm_users | userspace address space
  
  All mm_users references share a single reference to the mm_struct.

---
Brendan Jackman (3):
      kunit: test: Delete pointless resource API usage
      kthread: Add kthread_take_mm()
      kunit: test: fix mm_struct leak in kunit_attach_mm()

 include/linux/kthread.h |  1 +
 kernel/fork.c           |  3 +-
 kernel/kthread.c        | 36 +++++++++++++++++------
 lib/kunit/user_alloc.c  | 78 +++++--------------------------------------------
 4 files changed, 37 insertions(+), 81 deletions(-)
---
base-commit: 9448598b22c50c8a5bb77a9103e2d49f134c9578
change-id: 20251223-b4-kunit-user-alloc-6ae8df0b8a92

Best regards,
-- 
Brendan Jackman <jackmanb@google.com>