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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

6
net/802/garp.c
View File

@@ -221,7 +221,7 @@ static int garp_pdu_init(struct garp_applicant *app)
skb->protocol = htons(ETH_P_802_2);
skb_reserve(skb, LL_RESERVED_SPACE(app->dev) + LLC_RESERVE);
gp = (struct garp_pdu_hdr *)__skb_put(skb, sizeof(*gp));
gp = __skb_put(skb, sizeof(*gp));
put_unaligned(htons(GARP_PROTOCOL_ID), &gp->protocol);
app->pdu = skb;
@@ -268,7 +268,7 @@ static int garp_pdu_append_msg(struct garp_applicant *app, u8 attrtype)
if (skb_tailroom(app->pdu) < sizeof(*gm))
return -1;
gm = (struct garp_msg_hdr *)__skb_put(app->pdu, sizeof(*gm));
gm = __skb_put(app->pdu, sizeof(*gm));
gm->attrtype = attrtype;
garp_cb(app->pdu)->cur_type = attrtype;
return 0;
@@ -299,7 +299,7 @@ again:
len = sizeof(*ga) + attr->dlen;
if (skb_tailroom(app->pdu) < len)
goto queue;
ga = (struct garp_attr_hdr *)__skb_put(app->pdu, len);
ga = __skb_put(app->pdu, len);
ga->len = len;
ga->event = event;
memcpy(ga->data, attr->data, attr->dlen);

11
net/802/mrp.c
View File

@@ -311,7 +311,7 @@ static int mrp_pdu_init(struct mrp_applicant *app)
skb_reset_network_header(skb);
skb_reset_transport_header(skb);
ph = (struct mrp_pdu_hdr *)__skb_put(skb, sizeof(*ph));
ph = __skb_put(skb, sizeof(*ph));
ph->version = app->app->version;
app->pdu = skb;
@@ -324,7 +324,7 @@ static int mrp_pdu_append_end_mark(struct mrp_applicant *app)
if (skb_tailroom(app->pdu) < sizeof(*endmark))
return -1;
endmark = (__be16 *)__skb_put(app->pdu, sizeof(*endmark));
endmark = __skb_put(app->pdu, sizeof(*endmark));
put_unaligned(MRP_END_MARK, endmark);
return 0;
}
@@ -368,7 +368,7 @@ static int mrp_pdu_append_msg_hdr(struct mrp_applicant *app,
if (skb_tailroom(app->pdu) < sizeof(*mh))
return -1;
mh = (struct mrp_msg_hdr *)__skb_put(app->pdu, sizeof(*mh));
mh = __skb_put(app->pdu, sizeof(*mh));
mh->attrtype = attrtype;
mh->attrlen = attrlen;
mrp_cb(app->pdu)->mh = mh;
@@ -382,8 +382,7 @@ static int mrp_pdu_append_vecattr_hdr(struct mrp_applicant *app,
if (skb_tailroom(app->pdu) < sizeof(*vah) + attrlen)
return -1;
vah = (struct mrp_vecattr_hdr *)__skb_put(app->pdu,
sizeof(*vah) + attrlen);
vah = __skb_put(app->pdu, sizeof(*vah) + attrlen);
put_unaligned(0, &vah->lenflags);
memcpy(vah->firstattrvalue, firstattrvalue, attrlen);
mrp_cb(app->pdu)->vah = vah;
@@ -435,7 +434,7 @@ again:
if (!pos) {
if (skb_tailroom(app->pdu) < sizeof(u8))
goto queue;
vaevents = (u8 *)__skb_put(app->pdu, sizeof(u8));
vaevents = __skb_put(app->pdu, sizeof(u8));
} else {
vaevents = (u8 *)(skb_tail_pointer(app->pdu) - sizeof(u8));
}