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The remain_on_channel, mgmt_tx, and probe_peer ops previously used a u64 *cookie output parameter. Now that cfg80211 pre-assigns the cookie value before invoking drivers, the parameter conveys a value from caller to driver, not the other way around. Convert it to a plain u64 input parameter across the ops struct (cfg80211.h), rdev-ops.h wrappers, nl80211.c/mlme.c call sites, mac80211, and all driver implementations. The tx_control_port op is excluded: its cookie pointer is nullable (passed as NULL when dont_wait_for_ack is set), so the nullable pointer semantics are still required. Internal mac80211 helpers ieee80211_start_roc_work() and ieee80211_attach_ack_skb() still take u64 *cookie because they assign to the pointee; their callers now pass &cookie to take the address of the local value parameter. wil6210's internal wil_p2p_listen() is also updated to take u64 cookie since it is called directly from the remain_on_channel callback. Assisted-by: Claude:claude-sonnet-4-6 Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com> Link: https://patch.msgid.link/20260731123509.1975281-12-arend.vanspriel@broadcom.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>