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networking: make skb_put & friends return void pointers

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It seems like a historic accident that these return unsigned char *,
and in many places that means casts are required, more often than not.

Make these functions (skb_put, __skb_put and pskb_put) return void *
and remove all the casts across the tree, adding a (u8 *) cast only
where the unsigned char pointer was used directly, all done with the
following spatch:

    @@
    expression SKB, LEN;
    typedef u8;
    identifier fn = { skb_put, __skb_put };
    @@
    - *(fn(SKB, LEN))
    + *(u8 *)fn(SKB, LEN)

    @@
    expression E, SKB, LEN;
    identifier fn = { skb_put, __skb_put };
    type T;
    @@
    - E = ((T *)(fn(SKB, LEN)))
    + E = fn(SKB, LEN)

which actually doesn't cover pskb_put since there are only three
users overall.

A handful of stragglers were converted manually, notably a macro in
drivers/isdn/i4l/isdn_bsdcomp.c and, oddly enough, one of the many
instances in net/bluetooth/hci_sock.c. In the former file, I also
had to fix one whitespace problem spatch introduced.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg
2017-06-16 14:29:21 +02:00
committed by David S. Miller
parent 59ae1d127a
commit 4df864c1d9
145 changed files with 486 additions and 547 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
net/bluetooth/hci_sock.c
View File

@@ -410,7 +410,7 @@ static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
if (!skb)
return NULL;
ni = (void *)skb_put(skb, HCI_MON_NEW_INDEX_SIZE);
ni = skb_put(skb, HCI_MON_NEW_INDEX_SIZE);
ni->type = hdev->dev_type;
ni->bus = hdev->bus;
bacpy(&ni->bdaddr, &hdev->bdaddr);
@@ -438,7 +438,7 @@ static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
if (!skb)
return NULL;
ii = (void *)skb_put(skb, HCI_MON_INDEX_INFO_SIZE);
ii = skb_put(skb, HCI_MON_INDEX_INFO_SIZE);
bacpy(&ii->bdaddr, &hdev->bdaddr);
ii->manufacturer = cpu_to_le16(hdev->manufacturer);
@@ -517,7 +517,7 @@ static struct sk_buff *create_monitor_ctrl_open(struct sock *sk)
put_unaligned_le16(format, skb_put(skb, 2));
skb_put_data(skb, ver, sizeof(ver));
put_unaligned_le32(flags, skb_put(skb, 4));
*skb_put(skb, 1) = TASK_COMM_LEN;
*(u8 *)skb_put(skb, 1) = TASK_COMM_LEN;
skb_put_data(skb, hci_pi(sk)->comm, TASK_COMM_LEN);
__net_timestamp(skb);
@@ -616,7 +616,7 @@ send_monitor_note(struct sock *sk, const char *fmt, ...)
va_start(args, fmt);
vsprintf(skb_put(skb, len), fmt, args);
*skb_put(skb, 1) = 0;
*(u8 *)skb_put(skb, 1) = 0;
va_end(args);
__net_timestamp(skb);
@@ -703,11 +703,11 @@ static void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data)
if (!skb)
return;
hdr = (void *)skb_put(skb, HCI_EVENT_HDR_SIZE);
hdr = skb_put(skb, HCI_EVENT_HDR_SIZE);
hdr->evt = HCI_EV_STACK_INTERNAL;
hdr->plen = sizeof(*ev) + dlen;
ev = (void *)skb_put(skb, sizeof(*ev) + dlen);
ev = skb_put(skb, sizeof(*ev) + dlen);
ev->type = type;
memcpy(ev->data, data, dlen);