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 11:48:40 -0400 |
| commit | 634fef61076d644b989b86abc2f560d81a089a31 (patch) | |
| tree | 41e0cfc0c640666a75ad07588df34addb18176d0 /drivers/net/usb | |
| parent | networking: make skb_push & __skb_push return void pointers (diff) | |
| download | linux-dev-634fef61076d644b989b86abc2f560d81a089a31.tar.xz linux-dev-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/net/usb')
| -rw-r--r-- | drivers/net/usb/cdc_ncm.c | 2 | ||||
| -rw-r--r-- | drivers/net/usb/net1080.c | 2 | ||||
| -rw-r--r-- | drivers/net/usb/zaurus.c | 8 |
3 files changed, 6 insertions, 6 deletions
diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c index 4d4837a0645b..bcb974707118 100644 --- a/drivers/net/usb/cdc_ncm.c +++ b/drivers/net/usb/cdc_ncm.c @@ -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 */ diff --git a/drivers/net/usb/net1080.c b/drivers/net/usb/net1080.c index be53ff30b7b5..18a13aa5fcbb 100644 --- a/drivers/net/usb/net1080.c +++ b/drivers/net/usb/net1080.c @@ -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 diff --git a/drivers/net/usb/zaurus.c b/drivers/net/usb/zaurus.c index dc3cd03763af..9c2196c3fd11 100644 --- a/drivers/net/usb/zaurus.c +++ b/drivers/net/usb/zaurus.c @@ -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; } |