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networking: add and use skb_put_u8()

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Joe and Bjørn suggested that it'd be nicer to not have the
cast in the fairly common case of doing
	*(u8 *)skb_put(skb, 1) = c;

Add skb_put_u8() for this case, and use it across the code,
using the following spatch:

    @@
    expression SKB, C, S;
    typedef u8;
    identifier fn = {skb_put};
    fresh identifier fn2 = fn ## "_u8";
    @@
    - *(u8 *)fn(SKB, S) = C;
    + fn2(SKB, C);

Note that due to the "S", the spatch isn't perfect, it should
have checked that S is 1, but there's also places that use a
sizeof expression like sizeof(var) or sizeof(u8) etc. Turns
out that nobody ever did something like
	*(u8 *)skb_put(skb, 2) = c;

which would be wrong anyway since the second byte wouldn't be
initialized.

Suggested-by: Joe Perches <joe@perches.com>
Suggested-by: Bjørn Mork <bjorn@mork.no>
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 14:29:24 +02:00
committed by David S. Miller
parent d58ff35122
commit 634fef6107
39 changed files with 106 additions and 100 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/bluetooth/bluecard_cs.c
+1 -1
View File
@@ -448,7 +448,7 @@ static void bluecard_receive(struct bluecard_info *info,
} else {
*(u8 *)skb_put(info->rx_skb, 1) = buf[i];
skb_put_u8(info->rx_skb, buf[i]);
info->rx_count--;
if (info->rx_count == 0) {
drivers/bluetooth/bt3c_cs.c
+1 -1
View File
@@ -282,7 +282,7 @@ static void bt3c_receive(struct bt3c_info *info)
__u8 x = inb(iobase + DATA_L);
*(u8 *)skb_put(info->rx_skb, 1) = x;
skb_put_u8(info->rx_skb, x);
inb(iobase + DATA_H);
info->rx_count--;
drivers/bluetooth/btuart_cs.c
+1 -1
View File
@@ -233,7 +233,7 @@ static void btuart_receive(struct btuart_info *info)
} else {
*(u8 *)skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
skb_put_u8(info->rx_skb, inb(iobase + UART_RX));
info->rx_count--;
if (info->rx_count == 0) {
drivers/bluetooth/btusb.c
+3 -3
View File
@@ -1844,7 +1844,7 @@ static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
evt->ncmd = 0x01;
evt->opcode = cpu_to_le16(opcode);
*(u8 *)skb_put(skb, 1) = 0x00;
skb_put_u8(skb, 0x00);
hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
@@ -2767,8 +2767,8 @@ static struct urb *alloc_diag_urb(struct hci_dev *hdev, bool enable)
return ERR_PTR(-ENOMEM);
}
*(u8 *)skb_put(skb, 1) = 0xf0;
*(u8 *)skb_put(skb, 1) = enable;
skb_put_u8(skb, 0xf0);
skb_put_u8(skb, enable);
pipe = usb_sndbulkpipe(data->udev, data->diag_tx_ep->bEndpointAddress);
drivers/bluetooth/dtl1_cs.c
+2 -2
View File
@@ -226,7 +226,7 @@ static void dtl1_receive(struct dtl1_info *info)
}
}
*(u8 *)skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
skb_put_u8(info->rx_skb, inb(iobase + UART_RX));
nsh = (struct nsh *)info->rx_skb->data;
info->rx_count--;
@@ -414,7 +414,7 @@ static int dtl1_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
skb_reserve(s, NSHL);
skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
if (skb->len & 0x0001)
*(u8 *)skb_put(s, 1) = 0; /* PAD */
skb_put_u8(s, 0); /* PAD */
/* Prepend skb with Nokia frame header and queue */
memcpy(skb_push(s, NSHL), &nsh, NSHL);
drivers/bluetooth/hci_bcm.c
+3 -3
View File
@@ -262,9 +262,9 @@ static int bcm_set_diag(struct hci_dev *hdev, bool enable)
if (!skb)
return -ENOMEM;
*(u8 *)skb_put(skb, 1) = BCM_LM_DIAG_PKT;
*(u8 *)skb_put(skb, 1) = 0xf0;
*(u8 *)skb_put(skb, 1) = enable;
skb_put_u8(skb, BCM_LM_DIAG_PKT);
skb_put_u8(skb, 0xf0);
skb_put_u8(skb, enable);
skb_queue_tail(&bcm->txq, skb);
hci_uart_tx_wakeup(hu);
drivers/bluetooth/hci_intel.c
+1 -1
View File
@@ -470,7 +470,7 @@ static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
evt->ncmd = 0x01;
evt->opcode = cpu_to_le16(opcode);
*(u8 *)skb_put(skb, 1) = 0x00;
skb_put_u8(skb, 0x00);
hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
drivers/bluetooth/hci_nokia.c
+1 -1
View File
@@ -532,7 +532,7 @@ static int nokia_enqueue(struct hci_uart *hu, struct sk_buff *skb)
err = skb_pad(skb, 1);
if (err)
return err;
*(u8 *)skb_put(skb, 1) = 0x00;
skb_put_u8(skb, 0x00);
}
skb_queue_tail(&btdev->txq, skb);
drivers/bluetooth/hci_qca.c
+1 -1
View File
@@ -215,7 +215,7 @@ static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu)
}
/* Assign HCI_IBS type */
*(u8 *)skb_put(skb, 1) = cmd;
skb_put_u8(skb, cmd);
skb_queue_tail(&qca->txq, skb);
drivers/bluetooth/hci_vhci.c
+2 -2
View File
@@ -146,8 +146,8 @@ static int __vhci_create_device(struct vhci_data *data, __u8 opcode)
hci_skb_pkt_type(skb) = HCI_VENDOR_PKT;
*(u8 *)skb_put(skb, 1) = 0xff;
*(u8 *)skb_put(skb, 1) = opcode;
skb_put_u8(skb, 0xff);
skb_put_u8(skb, opcode);
put_unaligned_le16(hdev->id, skb_put(skb, 2));
skb_queue_tail(&data->readq, skb);
drivers/isdn/capi/capi.c
+2 -2
View File
@@ -1082,7 +1082,7 @@ static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
skb = mp->outskb;
if (skb) {
if (skb_tailroom(skb) > 0) {
*(u8 *)skb_put(skb, 1) = ch;
skb_put_u8(skb, ch);
goto unlock_out;
}
mp->outskb = NULL;
@@ -1094,7 +1094,7 @@ static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + CAPI_MAX_BLKSIZE, GFP_ATOMIC);
if (skb) {
skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
*(u8 *)skb_put(skb, 1) = ch;
skb_put_u8(skb, ch);
mp->outskb = skb;
} else {
printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
drivers/isdn/gigaset/asyncdata.c
+11 -11
View File
@@ -492,33 +492,33 @@ static struct sk_buff *HDLC_Encode(struct sk_buff *skb)
hdlc_skb->mac_len = skb->mac_len;
/* Add flag sequence in front of everything.. */
*(u8 *)skb_put(hdlc_skb, 1) = PPP_FLAG;
skb_put_u8(hdlc_skb, PPP_FLAG);
/* Perform byte stuffing while copying data. */
while (skb->len--) {
if (muststuff(*skb->data)) {
*(u8 *)skb_put(hdlc_skb, 1) = PPP_ESCAPE;
*(u8 *)skb_put(hdlc_skb, 1) = (*skb->data++) ^ PPP_TRANS;
skb_put_u8(hdlc_skb, PPP_ESCAPE);
skb_put_u8(hdlc_skb, (*skb->data++) ^ PPP_TRANS);
} else
*(u8 *)skb_put(hdlc_skb, 1) = *skb->data++;
skb_put_u8(hdlc_skb, *skb->data++);
}
/* Finally add FCS (byte stuffed) and flag sequence */
c = (fcs & 0x00ff); /* least significant byte first */
if (muststuff(c)) {
*(u8 *)skb_put(hdlc_skb, 1) = PPP_ESCAPE;
skb_put_u8(hdlc_skb, PPP_ESCAPE);
c ^= PPP_TRANS;
}
*(u8 *)skb_put(hdlc_skb, 1) = c;
skb_put_u8(hdlc_skb, c);
c = ((fcs >> 8) & 0x00ff);
if (muststuff(c)) {
*(u8 *)skb_put(hdlc_skb, 1) = PPP_ESCAPE;
skb_put_u8(hdlc_skb, PPP_ESCAPE);
c ^= PPP_TRANS;
}
*(u8 *)skb_put(hdlc_skb, 1) = c;
skb_put_u8(hdlc_skb, c);
*(u8 *)skb_put(hdlc_skb, 1) = PPP_FLAG;
skb_put_u8(hdlc_skb, PPP_FLAG);
dev_kfree_skb_any(skb);
return hdlc_skb;
@@ -561,8 +561,8 @@ static struct sk_buff *iraw_encode(struct sk_buff *skb)
while (len--) {
c = bitrev8(*cp++);
if (c == DLE_FLAG)
*(u8 *)skb_put(iraw_skb, 1) = c;
*(u8 *)skb_put(iraw_skb, 1) = c;
skb_put_u8(iraw_skb, c);
skb_put_u8(iraw_skb, c);
}
dev_kfree_skb_any(skb);
return iraw_skb;
drivers/isdn/i4l/isdn_bsdcomp.c
+4 -3
View File
@@ -602,7 +602,8 @@ static int bsd_compress(void *state, struct sk_buff *skb_in, struct sk_buff *skb
* Do not emit a completely useless byte of ones.
*/
if (bitno < 32 && skb_out && skb_tailroom(skb_out) > 0)
*(u8 *)skb_put(skb_out, 1) = (unsigned char)((accm | (0xff << (bitno - 8))) >> 24);
skb_put_u8(skb_out,
(unsigned char)((accm | (0xff << (bitno - 8))) >> 24));
/*
* Increase code size if we would have without the packet
@@ -698,7 +699,7 @@ static int bsd_decompress(void *state, struct sk_buff *skb_in, struct sk_buff *s
db->bytes_out += ilen;
if (skb_tailroom(skb_out) > 0)
*(u8 *)skb_put(skb_out, 1) = 0;
skb_put_u8(skb_out, 0);
else
return DECOMP_ERR_NOMEM;
@@ -816,7 +817,7 @@ static int bsd_decompress(void *state, struct sk_buff *skb_in, struct sk_buff *s
#endif
if (extra) /* the KwKwK case again */
*(u8 *)skb_put(skb_out, 1) = finchar;
skb_put_u8(skb_out, finchar);
/*
* If not first code in a packet, and
drivers/isdn/i4l/isdn_x25iface.c
+2 -2
View File
@@ -224,7 +224,7 @@ static int isdn_x25iface_connect_ind(struct concap_proto *cprot)
skb = dev_alloc_skb(1);
if (skb) {
*(u8 *)skb_put(skb, 1) = X25_IFACE_CONNECT;
skb_put_u8(skb, X25_IFACE_CONNECT);
skb->protocol = x25_type_trans(skb, cprot->net_dev);
netif_rx(skb);
return 0;
@@ -253,7 +253,7 @@ static int isdn_x25iface_disconn_ind(struct concap_proto *cprot)
*state_p = WAN_DISCONNECTED;
skb = dev_alloc_skb(1);
if (skb) {
*(u8 *)skb_put(skb, 1) = X25_IFACE_DISCONNECT;
skb_put_u8(skb, X25_IFACE_DISCONNECT);
skb->protocol = x25_type_trans(skb, cprot->net_dev);
netif_rx(skb);
return 0;
drivers/net/hamradio/scc.c
+2 -2
View File
@@ -540,7 +540,7 @@ static inline void scc_rxint(struct scc_channel *scc)
}
scc->rx_buff = skb;
*(u8 *)skb_put(skb, 1) = 0; /* KISS data */
skb_put_u8(skb, 0); /* KISS data */
}
if (skb->len >= scc->stat.bufsize)
@@ -555,7 +555,7 @@ static inline void scc_rxint(struct scc_channel *scc)
return;
}
*(u8 *)skb_put(skb, 1) = Inb(scc->data);
skb_put_u8(skb, Inb(scc->data));
}
drivers/net/usb/cdc_ncm.c
+1 -1
View File
@@ -1250,7 +1250,7 @@ cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)
skb_put_zero(skb_out, padding_count);
} else if (skb_out->len < ctx->tx_max &&
(skb_out->len % dev->maxpacket) == 0) {
*(u8 *)skb_put(skb_out, 1) = 0; /* force short packet */
skb_put_u8(skb_out, 0); /* force short packet */
}
/* set final frame length */
drivers/net/usb/net1080.c
+1 -1
View File
@@ -473,7 +473,7 @@ encapsulate:
/* maybe pad; then trailer */
if (!((skb->len + sizeof *trailer) & 0x01))
*(u8 *)skb_put(skb, 1) = PAD_BYTE;
skb_put_u8(skb, PAD_BYTE);
trailer = skb_put(skb, sizeof *trailer);
put_unaligned(header->packet_id, &trailer->packet_id);
#if 0
drivers/net/usb/zaurus.c
+4 -4
View File
@@ -74,10 +74,10 @@ done:
fcs = crc32_le(~0, skb->data, skb->len);
fcs = ~fcs;
*(u8 *)skb_put(skb, 1) = fcs & 0xff;
*(u8 *)skb_put(skb, 1) = (fcs>> 8) & 0xff;
*(u8 *)skb_put(skb, 1) = (fcs>>16) & 0xff;
*(u8 *)skb_put(skb, 1) = (fcs>>24) & 0xff;
skb_put_u8(skb, fcs & 0xff);
skb_put_u8(skb, (fcs >> 8) & 0xff);
skb_put_u8(skb, (fcs >> 16) & 0xff);
skb_put_u8(skb, (fcs >> 24) & 0xff);
}
return skb;
}
drivers/nfc/fdp/i2c.c
+1 -1
View File
@@ -86,7 +86,7 @@ static void fdp_nci_i2c_add_len_lrc(struct sk_buff *skb)
for (i = 0; i < len + 2; i++)
lrc ^= skb->data[i];
*(u8 *)skb_put(skb, 1) = lrc;
skb_put_u8(skb, lrc);
}
static void fdp_nci_i2c_remove_len_lrc(struct sk_buff *skb)
drivers/nfc/microread/i2c.c
+2 -2
View File
@@ -75,7 +75,7 @@ static void microread_i2c_add_len_crc(struct sk_buff *skb)
for (i = 0; i < skb->len; i++)
crc = crc ^ skb->data[i];
*(u8 *)skb_put(skb, 1) = crc;
skb_put_u8(skb, crc);
}
static void microread_i2c_remove_len_crc(struct sk_buff *skb)
@@ -173,7 +173,7 @@ static int microread_i2c_read(struct microread_i2c_phy *phy,
goto flush;
}
*(u8 *)skb_put(*skb, 1) = len;
skb_put_u8(*skb, len);
r = i2c_master_recv(client, skb_put(*skb, len), len);
if (r != len) {

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