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Bluetooth: Compress the size of struct hci_ctrl

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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>
This commit is contained in:
Johan Hedberg 2015-11-05 09:31:40 +02:00 committed by Marcel Holtmann
parent 5fcc86bd26
commit 44d2713774
4 changed files with 23 additions and 14 deletions
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7
include/net/bluetooth/bluetooth.h
View File

@ -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;
union {
hci_req_complete_t req_complete;
hci_req_complete_skb_t req_complete_skb;
};
};
struct bt_skb_cb {

14
net/bluetooth/hci_core.c
View File

@ -3695,7 +3695,7 @@ 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)->hci.req_start = true;
bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
skb_queue_tail(&hdev->cmd_q, skb);
queue_work(hdev->workqueue, &hdev->cmd_work);
@ -4392,7 +4392,7 @@ static bool hci_req_is_complete(struct hci_dev *hdev)
if (!skb)
return true;
return bt_cb(skb)->hci.req_start;
return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
}
static void hci_resend_last(struct hci_dev *hdev)
@ -4452,20 +4452,20 @@ void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
* callback would be found in hdev->sent_cmd instead of the
* command queue (hdev->cmd_q).
*/
if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
*req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
*req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
return;
}
if (bt_cb(hdev->sent_cmd)->hci.req_complete_skb) {
*req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
*req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
return;
}
/* 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)->hci.req_start) {
if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
__skb_queue_head(&hdev->cmd_q, skb);
break;
}

6
net/bluetooth/hci_request.c
View File

@ -56,8 +56,12 @@ static int req_run(struct hci_request *req, hci_req_complete_t complete,
return -ENODATA;
skb = skb_peek_tail(&req->cmd_q);
if (complete) {
bt_cb(skb)->hci.req_complete = complete;
} else if (complete_skb) {
bt_cb(skb)->hci.req_complete_skb = complete_skb;
bt_cb(skb)->hci.req_flags |= HCI_REQ_SKB;
}
spin_lock_irqsave(&hdev->cmd_q.lock, flags);
skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
@ -128,7 +132,7 @@ void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
}
if (skb_queue_empty(&req->cmd_q))
bt_cb(skb)->hci.req_start = true;
bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
bt_cb(skb)->hci.req_event = event;

2
net/bluetooth/hci_sock.c
View File

@ -1249,7 +1249,7 @@ static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg,
/* Stand-alone HCI commands must be flagged as
* single-command requests.
*/
bt_cb(skb)->hci.req_start = true;
bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
skb_queue_tail(&hdev->cmd_q, skb);
queue_work(hdev->workqueue, &hdev->cmd_work);