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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

15
drivers/crypto/chelsio/chcr_algo.c
View file

@ -604,8 +604,7 @@ static struct sk_buff
if (!skb)
return ERR_PTR(-ENOMEM);
skb_reserve(skb, sizeof(struct sge_opaque_hdr));
chcr_req = __skb_put(skb, transhdr_len);
memset(chcr_req, 0, transhdr_len);
chcr_req = __skb_put_zero(skb, transhdr_len);
chcr_req->sec_cpl.op_ivinsrtofst =
FILL_SEC_CPL_OP_IVINSR(ctx->dev->rx_channel_id, 2, 1);
@ -881,8 +880,7 @@ static struct sk_buff *create_hash_wr(struct ahash_request *req,
return skb;
skb_reserve(skb, sizeof(struct sge_opaque_hdr));
chcr_req = __skb_put(skb, transhdr_len);
memset(chcr_req, 0, transhdr_len);
chcr_req = __skb_put_zero(skb, transhdr_len);
chcr_req->sec_cpl.op_ivinsrtofst =
FILL_SEC_CPL_OP_IVINSR(ctx->dev->rx_channel_id, 2, 0);
@ -1447,8 +1445,7 @@ static struct sk_buff *create_authenc_wr(struct aead_request *req,
skb_reserve(skb, sizeof(struct sge_opaque_hdr));
/* Write WR */
chcr_req = __skb_put(skb, transhdr_len);
memset(chcr_req, 0, transhdr_len);
chcr_req = __skb_put_zero(skb, transhdr_len);
stop_offset = (op_type == CHCR_ENCRYPT_OP) ? 0 : authsize;
@ -1779,8 +1776,7 @@ static struct sk_buff *create_aead_ccm_wr(struct aead_request *req,
skb_reserve(skb, sizeof(struct sge_opaque_hdr));
chcr_req = __skb_put(skb, transhdr_len);
memset(chcr_req, 0, transhdr_len);
chcr_req = __skb_put_zero(skb, transhdr_len);
fill_sec_cpl_for_aead(&chcr_req->sec_cpl, dst_size, req, op_type, ctx);
@ -1892,8 +1888,7 @@ static struct sk_buff *create_gcm_wr(struct aead_request *req,
/* NIC driver is going to write the sge hdr. */
skb_reserve(skb, sizeof(struct sge_opaque_hdr));
chcr_req = __skb_put(skb, transhdr_len);
memset(chcr_req, 0, transhdr_len);
chcr_req = __skb_put_zero(skb, transhdr_len);
if (get_aead_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106)
req->assoclen -= 8;