apparmor: constify aa_label parameters on read-only query helpers

Several label helpers only read from their struct aa_label * arguments:
they compare labels, test subset relationships, or check the mediation
bitmask, all via direct field/index access. Mark those parameters
const struct aa_label * to document intent and let the compiler enforce
that the label is not modified.

The converted functions are:
  - label_mediates(), label_mediates_safe()
  - aa_label_cmp() (and its vec_cmp() helper)
  - __aa_label_next_not_in_set(), aa_label_is_subset(),
    aa_label_is_unconfined_subset()
  - __aa_subj_label_is_cached()
  - aa_label_next_confined(), aa_label_next_in_merge()

These all access the label through direct indexing or manual iterators
rather than the label_for_each()/fn_for_each() macros, which are not
const-correct and so gate the majority of the remaining label consumers
(the print, match, and permission-check paths) from being constified.

No functional change.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Assisted-by: Claude:claude-opus-4.8

0 files changed, 0 insertions, 0 deletions