[PATCH batadv v2 0/2] batman-adv: tt: use atomic flag modifications

The flags of translation table entries are modified in various places using
RMW operations like:

* read flags + add flag + store
* read flags + remove flag + store

These were done without making sure that no other context is doing a
similar operation at the same time. If another context does modify the
flags then it could happen that a store of the flag modifications is simply
lost. This problem can usually be fixed at a later point when the flags are
tried to be adjusted again.

To reduce the time the wrong flags are used, it is better to change the u16
flags type to use an atomic_t with its atomic helper to perform these
adjustments.

Signed-off-by: Sven Eckelmann <[email protected]>
---
Changes in v2:
- rebase and drop already merged first fix
- remove RFC prefix
- Link to v1: https://patch.msgid.link/[email protected]

---
Sven Eckelmann (2):
      batman-adv: tt: use atomic flag modifications
      batman-adv: tt: simplify NEW flag transition code

 net/batman-adv/translation-table.c | 255 +++++++++++++++++++++++--------------
 net/batman-adv/types.h             |   2 +-
 2 files changed, 162 insertions(+), 95 deletions(-)
---
base-commit: 6f34546691685542e30c7f7a3a5612821e917560
change-id: 20260613-tt-atomic-refactor-9c9b23a413f2

Best regards,
--  
Sven Eckelmann <[email protected]>