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authorJohannes Berg <johannes.berg@intel.com>2017-06-16 14:29:23 +0200
committerDavid S. Miller <davem@davemloft.net>2017-06-16 11:48:40 -0400
commitd58ff35122847a83ba55394e2ae3a1527b6febf5 (patch)
treee1ecf758e86519922c403f1aa88f19ef25a554ad /drivers/net/ppp
parentnetworking: make skb_pull & friends return void pointers (diff)
downloadlinux-dev-d58ff35122847a83ba55394e2ae3a1527b6febf5.tar.xz
linux-dev-d58ff35122847a83ba55394e2ae3a1527b6febf5.zip
networking: make skb_push & __skb_push return void pointers
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 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_push, __skb_push, skb_push_rcsum }; @@ - *(fn(SKB, LEN)) + *(u8 *)fn(SKB, LEN) @@ expression E, SKB, LEN; identifier fn = { skb_push, __skb_push, skb_push_rcsum }; type T; @@ - E = ((T *)(fn(SKB, LEN))) + E = fn(SKB, LEN) @@ expression SKB, LEN; identifier fn = { skb_push, __skb_push, skb_push_rcsum }; @@ - fn(SKB, LEN)[0] + *(u8 *)fn(SKB, LEN) Note that the last part there converts from push(...)[0] to the more idiomatic *(u8 *)push(...). Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ppp')
-rw-r--r--drivers/net/ppp/ppp_async.c2
-rw-r--r--drivers/net/ppp/ppp_generic.c6
-rw-r--r--drivers/net/ppp/ppp_synctty.c2
-rw-r--r--drivers/net/ppp/pptp.c2
4 files changed, 6 insertions, 6 deletions
diff --git a/drivers/net/ppp/ppp_async.c b/drivers/net/ppp/ppp_async.c
index 32c72db654e2..814fd8fae67d 100644
--- a/drivers/net/ppp/ppp_async.c
+++ b/drivers/net/ppp/ppp_async.c
@@ -802,7 +802,7 @@ process_input_packet(struct asyncppp *ap)
proto = p[0];
if (proto & 1) {
/* protocol is compressed */
- skb_push(skb, 1)[0] = 0;
+ *(u8 *)skb_push(skb, 1) = 0;
} else {
if (skb->len < 2)
goto err;
diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index bbded33120fe..d42091f11eb8 100644
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -1490,7 +1490,7 @@ ppp_send_frame(struct ppp *ppp, struct sk_buff *skb)
/* check if we should pass this packet */
/* the filter instructions are constructed assuming
a four-byte PPP header on each packet */
- *skb_push(skb, 2) = 1;
+ *(u8 *)skb_push(skb, 2) = 1;
if (ppp->pass_filter &&
BPF_PROG_RUN(ppp->pass_filter, skb) == 0) {
if (ppp->debug & 1)
@@ -2133,7 +2133,7 @@ ppp_receive_nonmp_frame(struct ppp *ppp, struct sk_buff *skb)
if (skb_unclone(skb, GFP_ATOMIC))
goto err;
- *skb_push(skb, 2) = 0;
+ *(u8 *)skb_push(skb, 2) = 0;
if (ppp->pass_filter &&
BPF_PROG_RUN(ppp->pass_filter, skb) == 0) {
if (ppp->debug & 1)
@@ -2267,7 +2267,7 @@ ppp_receive_mp_frame(struct ppp *ppp, struct sk_buff *skb, struct channel *pch)
* Do protocol ID decompression on the first fragment of each packet.
*/
if ((PPP_MP_CB(skb)->BEbits & B) && (skb->data[0] & 1))
- *skb_push(skb, 1) = 0;
+ *(u8 *)skb_push(skb, 1) = 0;
/*
* Expand sequence number to 32 bits, making it as close
diff --git a/drivers/net/ppp/ppp_synctty.c b/drivers/net/ppp/ppp_synctty.c
index ce2300c0bcbf..ef08590db873 100644
--- a/drivers/net/ppp/ppp_synctty.c
+++ b/drivers/net/ppp/ppp_synctty.c
@@ -711,7 +711,7 @@ ppp_sync_input(struct syncppp *ap, const unsigned char *buf,
/* decompress protocol field if compressed */
if (p[0] & 1) {
/* protocol is compressed */
- skb_push(skb, 1)[0] = 0;
+ *(u8 *)skb_push(skb, 1) = 0;
} else if (skb->len < 2)
goto err;
diff --git a/drivers/net/ppp/pptp.c b/drivers/net/ppp/pptp.c
index 1951b1085cb8..2f22e318a67f 100644
--- a/drivers/net/ppp/pptp.c
+++ b/drivers/net/ppp/pptp.c
@@ -328,7 +328,7 @@ allow_packet:
if ((*skb->data) & 1) {
/* protocol is compressed */
- skb_push(skb, 1)[0] = 0;
+ *(u8 *)skb_push(skb, 1) = 0;
}
skb->ip_summed = CHECKSUM_NONE;