Bluetooth: Compress the size of struct hci_ctrl

We can reduce the size of the hci_ctrl struct by converting
'bool req_start' to 'u8 req_flags' and making the two function
pointers a union (since only one is ever set at a time).

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 8 insertions, 3 deletions

diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
index a85e6d3d75ef..8d38f411009c 100644
--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -296,12 +296,17 @@ typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
 typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status,
                                        u16 opcode, struct sk_buff *skb);
 
+#define HCI_REQ_START   BIT(0)
+#define HCI_REQ_SKB     BIT(1)
+
 struct hci_ctrl {
         __u16 opcode;
-        bool req_start;
+        u8 req_flags;
         u8 req_event;
-        hci_req_complete_t req_complete;
-        hci_req_complete_skb_t req_complete_skb;
+        union {
+                hci_req_complete_t req_complete;
+                hci_req_complete_skb_t req_complete_skb;
+        };
 };
 
 struct bt_skb_cb {