From 634fef61076d644b989b86abc2f560d81a089a31 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 16 Jun 2017 14:29:24 +0200 Subject: 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 Suggested-by: Bjørn Mork Signed-off-by: Johannes Berg Signed-off-by: David S. Miller --- drivers/isdn/gigaset/asyncdata.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) (limited to 'drivers/isdn/gigaset') 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; -- cgit v1.2.3-55-g7522