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net: introduce __skb_put_[zero, data, u8]

Browse source 
follow Johannes Berg, semantic patch file as below,
@@
identifier p, p2;
expression len;
expression skb;
type t, t2;
@@
(
-p = __skb_put(skb, len);
+p = __skb_put_zero(skb, len);
|
-p = (t)__skb_put(skb, len);
+p = __skb_put_zero(skb, len);
)
... when != p
(
p2 = (t2)p;
-memset(p2, 0, len);
|
-memset(p, 0, len);
)

@@
identifier p;
expression len;
expression skb;
type t;
@@
(
-t p = __skb_put(skb, len);
+t p = __skb_put_zero(skb, len);
)
... when != p
(
-memset(p, 0, len);
)

@@
type t, t2;
identifier p, p2;
expression skb;
@@
t *p;
...
(
-p = __skb_put(skb, sizeof(t));
+p = __skb_put_zero(skb, sizeof(t));
|
-p = (t *)__skb_put(skb, sizeof(t));
+p = __skb_put_zero(skb, sizeof(t));
)
... when != p
(
p2 = (t2)p;
-memset(p2, 0, sizeof(*p));
|
-memset(p, 0, sizeof(*p));
)

@@
expression skb, len;
@@
-memset(__skb_put(skb, len), 0, len);
+__skb_put_zero(skb, len);

@@
expression skb, len, data;
@@
-memcpy(__skb_put(skb, len), data, len);
+__skb_put_data(skb, data, len);

@@
expression SKB, C, S;
typedef u8;
identifier fn = {__skb_put};
fresh identifier fn2 = fn ## "_u8";
@@
- *(u8 *)fn(SKB, S) = C;
+ fn2(SKB, C);

Signed-off-by: yuan linyu <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
yuan linyu 2017-06-18 22:48:17 +08:00 • committed by David S. Miller
commit de77b966ce
19 changed files with 64 additions and 67 deletions
Download patch file Download diff file Expand all files Collapse all files

4
drivers/isdn/gigaset/asyncdata.c
View file

@ -264,7 +264,7 @@ byte_stuff:
/* skip remainder of packet */
bcs->rx_skb = skb = NULL;
} else {
*(u8 *)__skb_put(skb, 1) = c;
__skb_put_u8(skb, c);
fcs = crc_ccitt_byte(fcs, c);
}
}
@ -315,7 +315,7 @@ static unsigned iraw_loop(unsigned numbytes, struct inbuf_t *inbuf)
/* regular data byte: append to current skb */
inputstate |= INS_have_data;
*(u8 *)__skb_put(skb, 1) = bitrev8(c);
__skb_put_u8(skb, bitrev8(c));
}
/* pass data up */

2
drivers/isdn/gigaset/isocdata.c
View file

@ -511,7 +511,7 @@ static inline void hdlc_putbyte(unsigned char c, struct bc_state *bcs)
bcs->rx_skb = NULL;
return;
}
*(u8 *)__skb_put(bcs->rx_skb, 1) = c;
__skb_put_u8(bcs->rx_skb, c);
}
/* hdlc_flush