diff options
author | Johannes Berg <johannes.berg@intel.com> | 2017-06-16 14:29:24 +0200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2017-06-16 17:48:40 +0200 |
commit | 634fef61076d644b989b86abc2f560d81a089a31 (patch) | |
tree | 41e0cfc0c640666a75ad07588df34addb18176d0 /drivers/isdn | |
parent | networking: make skb_push & __skb_push return void pointers (diff) | |
download | linux-634fef61076d644b989b86abc2f560d81a089a31.tar.xz linux-634fef61076d644b989b86abc2f560d81a089a31.zip |
networking: add and use skb_put_u8()
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>
Diffstat (limited to 'drivers/isdn')
-rw-r--r-- | drivers/isdn/capi/capi.c | 4 | ||||
-rw-r--r-- | drivers/isdn/gigaset/asyncdata.c | 22 | ||||
-rw-r--r-- | drivers/isdn/i4l/isdn_bsdcomp.c | 7 | ||||
-rw-r--r-- | drivers/isdn/i4l/isdn_x25iface.c | 4 |
4 files changed, 19 insertions, 18 deletions
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c index 96f586d34d2d..dde8f46bc254 100644 --- a/drivers/isdn/capi/capi.c +++ b/drivers/isdn/capi/capi.c @@ -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); diff --git a/drivers/isdn/gigaset/asyncdata.c b/drivers/isdn/gigaset/asyncdata.c index 03ac9fbfe318..4caecdcc6f29 100644 --- a/drivers/isdn/gigaset/asyncdata.c +++ b/drivers/isdn/gigaset/asyncdata.c @@ -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; diff --git a/drivers/isdn/i4l/isdn_bsdcomp.c b/drivers/isdn/i4l/isdn_bsdcomp.c index 6ade0916da4e..3035210a6119 100644 --- a/drivers/isdn/i4l/isdn_bsdcomp.c +++ b/drivers/isdn/i4l/isdn_bsdcomp.c @@ -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 diff --git a/drivers/isdn/i4l/isdn_x25iface.c b/drivers/isdn/i4l/isdn_x25iface.c index e33fa3073f74..48bfbcb4a09d 100644 --- a/drivers/isdn/i4l/isdn_x25iface.c +++ b/drivers/isdn/i4l/isdn_x25iface.c @@ -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; |