xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

networking: make skb_push & __skb_push return void pointers

Browse Source 
It seems like a historic accident that these return unsigned char *,
and in many places that means casts are required, more often than not.

Make these functions return void * and remove all the casts across
the tree, adding a (u8 *) cast only where the unsigned char pointer
was used directly, all done with the following spatch:

    @@
    expression SKB, LEN;
    typedef u8;
    identifier fn = { skb_push, __skb_push, skb_push_rcsum };
    @@
    - *(fn(SKB, LEN))
    + *(u8 *)fn(SKB, LEN)

    @@
    expression E, SKB, LEN;
    identifier fn = { skb_push, __skb_push, skb_push_rcsum };
    type T;
    @@
    - E = ((T *)(fn(SKB, LEN)))
    + E = fn(SKB, LEN)

    @@
    expression SKB, LEN;
    identifier fn = { skb_push, __skb_push, skb_push_rcsum };
    @@
    - fn(SKB, LEN)[0]
    + *(u8 *)fn(SKB, LEN)

Note that the last part there converts from push(...)[0] to the
more idiomatic *(u8 *)push(...).

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg
2017-06-16 14:29:23 +02:00
committed by David S. Miller
parent af72868b90
commit d58ff35122
126 changed files with 204 additions and 234 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
net/nfc/digital_technology.c
View File

@@ -828,7 +828,7 @@ int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech)
sensf_req->rc = 0;
sensf_req->tsn = 0;
*skb_push(skb, 1) = size + 1;
*(u8 *)skb_push(skb, 1) = size + 1;
if (!DIGITAL_DRV_CAPS_IN_CRC(ddev))
digital_skb_add_crc_f(skb);
@@ -1161,7 +1161,7 @@ static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev,
break;
}
*skb_push(skb, sizeof(u8)) = size + 1;
*(u8 *)skb_push(skb, sizeof(u8)) = size + 1;
if (!DIGITAL_DRV_CAPS_TG_CRC(ddev))
digital_skb_add_crc_f(skb);