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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

17
net/irda/irlap_frame.c
View File

@@ -133,7 +133,7 @@ void irlap_send_snrm_frame(struct irlap_cb *self, struct qos_info *qos)
if (!tx_skb)
return;
frame = (struct snrm_frame *) skb_put(tx_skb, 2);
frame = skb_put(tx_skb, 2);
/* Insert connection address field */
if (qos)
@@ -228,7 +228,7 @@ void irlap_send_ua_response_frame(struct irlap_cb *self, struct qos_info *qos)
if (!tx_skb)
return;
frame = (struct ua_frame *) skb_put(tx_skb, 10);
frame = skb_put(tx_skb, 10);
/* Build UA response */
frame->caddr = self->caddr;
@@ -268,7 +268,7 @@ void irlap_send_dm_frame( struct irlap_cb *self)
if (!tx_skb)
return;
frame = (struct dm_frame *)skb_put(tx_skb, 2);
frame = skb_put(tx_skb, 2);
if (self->state == LAP_NDM)
frame->caddr = CBROADCAST;
@@ -298,7 +298,7 @@ void irlap_send_disc_frame(struct irlap_cb *self)
if (!tx_skb)
return;
frame = (struct disc_frame *)skb_put(tx_skb, 2);
frame = skb_put(tx_skb, 2);
frame->caddr = self->caddr | CMD_FRAME;
frame->control = DISC_CMD | PF_BIT;
@@ -587,7 +587,7 @@ void irlap_send_rr_frame(struct irlap_cb *self, int command)
if (!tx_skb)
return;
frame = (struct rr_frame *)skb_put(tx_skb, 2);
frame = skb_put(tx_skb, 2);
frame->caddr = self->caddr;
frame->caddr |= (command) ? CMD_FRAME : 0;
@@ -612,7 +612,7 @@ void irlap_send_rd_frame(struct irlap_cb *self)
if (!tx_skb)
return;
frame = (struct rd_frame *)skb_put(tx_skb, 2);
frame = skb_put(tx_skb, 2);
frame->caddr = self->caddr;
frame->control = RD_RSP | PF_BIT;
@@ -1202,14 +1202,13 @@ void irlap_send_test_frame(struct irlap_cb *self, __u8 caddr, __u32 daddr,
/* Broadcast frames must include saddr and daddr fields */
if (caddr == CBROADCAST) {
frame = (struct test_frame *)
skb_put(tx_skb, sizeof(struct test_frame));
frame = skb_put(tx_skb, sizeof(struct test_frame));
/* Insert the swapped addresses */
frame->saddr = cpu_to_le32(self->saddr);
frame->daddr = cpu_to_le32(daddr);
} else
frame = (struct test_frame *) skb_put(tx_skb, LAP_ADDR_HEADER + LAP_CTRL_HEADER);
frame = skb_put(tx_skb, LAP_ADDR_HEADER + LAP_CTRL_HEADER);
frame->caddr = caddr;
frame->control = TEST_RSP | PF_BIT;