of: overlay: remove unused of_overlay_remove_all()

of_overlay_remove_all() has no in-tree callers.

It is also subtly broken. It passes &ovcs->id to of_overlay_remove(),
which zeroes *ovcs_id once the changeset is reverted, before calling
free_overlay_changeset(). Through the aliased pointer that zeroes
ovcs->id itself, so free_overlay_changeset()'s "ovcs->id > 0" guard is
false and both idr_remove() and list_del() are skipped: the
overlay_changeset is kfree()d while still linked in ovcs_list and
registered in ovcs_idr.

Rather than fix a helper nobody calls, remove it, along with its
!CONFIG_OF_OVERLAY stub and the paragraph documenting it in
overlay-notes.rst and in the zh_CN translation.

ovcs_list itself stays: overlay_removal_is_ok() still walks it to check
that a changeset is topmost.

Reported-by: Sashiko AI <sashiko-bot@kernel.org>
Closes: https://lore.kernel.org/20260901014554.83A8D1F000E9@smtp.kernel.org
Suggested-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/all/20260928182658.GA185307-robh@kernel.org/
Signed-off-by: Abdurrahman Hussain <abdurrahman@nexthop.ai>
Link: https://patch.msgid.link/20261014-b4-of-overlay-remove-all-fix-v2-1-cf5ea2cc9dc3@nexthop.ai
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

0 files changed, 0 insertions, 0 deletions