net: bluetooth: compact struct bt_skb_cb by inlining struct hci_req_ctrl

struct hci_req_ctrl is never used outside of struct bt_skb_cb;
Inlining it frees 8 bytes on a 64 bit system in skb->cb[] allowing
the addition of more ancillary data.

Signed-off-by: Eyal Birger <eyal.birger@gmail.com>
Reviewed-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
index e00455a..0989366 100644 (file)
--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -275,21 +275,17 @@ struct hci_dev;
 
 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
 
-struct hci_req_ctrl {
-       bool                    start;
-       u8                      event;
-       hci_req_complete_t      complete;
-};
-
 struct bt_skb_cb {
        __u8 pkt_type;
        __u8 incoming;
        __u16 opcode;
        __u16 expect;
        __u8 force_active;
+       bool req_start;
+       u8 req_event;
+       hci_req_complete_t req_complete;
        struct l2cap_chan *chan;
        struct l2cap_ctrl control;
-       struct hci_req_ctrl req;
        bdaddr_t bdaddr;
        __le16 psm;
 };

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 3322d3f..85a0655 100644 (file)
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3517,7 +3517,7 @@ int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
        /* Stand-alone HCI commands must be flagged as
         * single-command requests.
         */
-       bt_cb(skb)->req.start = true;
+       bt_cb(skb)->req_start = true;
 
        skb_queue_tail(&hdev->cmd_q, skb);
        queue_work(hdev->workqueue, &hdev->cmd_work);
@@ -4195,7 +4195,7 @@ static bool hci_req_is_complete(struct hci_dev *hdev)
        if (!skb)
                return true;
 
-       return bt_cb(skb)->req.start;
+       return bt_cb(skb)->req_start;
 }
 
 static void hci_resend_last(struct hci_dev *hdev)
@@ -4255,14 +4255,14 @@ void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
         * command queue (hdev->cmd_q).
         */
        if (hdev->sent_cmd) {
-               req_complete = bt_cb(hdev->sent_cmd)->req.complete;
+               req_complete = bt_cb(hdev->sent_cmd)->req_complete;
 
                if (req_complete) {
                        /* We must set the complete callback to NULL to
                         * avoid calling the callback more than once if
                         * this function gets called again.
                         */
-                       bt_cb(hdev->sent_cmd)->req.complete = NULL;
+                       bt_cb(hdev->sent_cmd)->req_complete = NULL;
 
                        goto call_complete;
                }
@@ -4271,12 +4271,12 @@ void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
        /* Remove all pending commands belonging to this request */
        spin_lock_irqsave(&hdev->cmd_q.lock, flags);
        while ((skb = __skb_dequeue(&hdev->cmd_q))) {
-               if (bt_cb(skb)->req.start) {
+               if (bt_cb(skb)->req_start) {
                        __skb_queue_head(&hdev->cmd_q, skb);
                        break;
                }
 
-               req_complete = bt_cb(skb)->req.complete;
+               req_complete = bt_cb(skb)->req_complete;
                kfree_skb(skb);
        }
        spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index a3fb094..8e8c433 100644 (file)
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3106,7 +3106,7 @@ static void hci_cmd_status_evt(struct hci_dev *hdev, struct sk_buff *skb)
                cancel_delayed_work(&hdev->cmd_timer);
 
        if (ev->status ||
-           (hdev->sent_cmd && !bt_cb(hdev->sent_cmd)->req.event))
+           (hdev->sent_cmd && !bt_cb(hdev->sent_cmd)->req_event))
                hci_req_cmd_complete(hdev, opcode, ev->status);
 
        if (ev->ncmd && !test_bit(HCI_RESET, &hdev->flags)) {
@@ -5039,7 +5039,7 @@ void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
 
        skb_pull(skb, HCI_EVENT_HDR_SIZE);
 
-       if (hdev->sent_cmd && bt_cb(hdev->sent_cmd)->req.event == event) {
+       if (hdev->sent_cmd && bt_cb(hdev->sent_cmd)->req_event == event) {
                struct hci_command_hdr *cmd_hdr = (void *) hdev->sent_cmd->data;
                u16 opcode = __le16_to_cpu(cmd_hdr->opcode);
 

diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index b59f92c..db2f45a 100644 (file)
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -55,7 +55,7 @@ int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
                return -ENODATA;
 
        skb = skb_peek_tail(&req->cmd_q);
-       bt_cb(skb)->req.complete = complete;
+       bt_cb(skb)->req_complete = complete;
 
        spin_lock_irqsave(&hdev->cmd_q.lock, flags);
        skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
@@ -116,9 +116,9 @@ void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
        }
 
        if (skb_queue_empty(&req->cmd_q))
-               bt_cb(skb)->req.start = true;
+               bt_cb(skb)->req_start = true;
 
-       bt_cb(skb)->req.event = event;
+       bt_cb(skb)->req_event = event;
 
        skb_queue_tail(&req->cmd_q, skb);
 }

diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 1d65c5b..f003818 100644 (file)
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -965,7 +965,7 @@ static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
                        /* Stand-alone HCI commands must be flagged as
                         * single-command requests.
                         */
-                       bt_cb(skb)->req.start = true;
+                       bt_cb(skb)->req_start = true;
 
                        skb_queue_tail(&hdev->cmd_q, skb);
                        queue_work(hdev->workqueue, &hdev->cmd_work);