From d58ff35122847a83ba55394e2ae3a1527b6febf5 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 16 Jun 2017 14:29:23 +0200 Subject: networking: make skb_push & __skb_push return void pointers 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 Signed-off-by: David S. Miller --- drivers/nfc/pn544/pn544.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers/nfc/pn544/pn544.c') diff --git a/drivers/nfc/pn544/pn544.c b/drivers/nfc/pn544/pn544.c index 12e819ddf17a..70e898e38b16 100644 --- a/drivers/nfc/pn544/pn544.c +++ b/drivers/nfc/pn544/pn544.c @@ -649,8 +649,8 @@ static int pn544_hci_im_transceive(struct nfc_hci_dev *hdev, } else return 1; case PN544_RF_READER_F_GATE: - *skb_push(skb, 1) = 0; - *skb_push(skb, 1) = 0; + *(u8 *)skb_push(skb, 1) = 0; + *(u8 *)skb_push(skb, 1) = 0; info->async_cb_type = PN544_CB_TYPE_READER_F; info->async_cb = cb; @@ -665,7 +665,7 @@ static int pn544_hci_im_transceive(struct nfc_hci_dev *hdev, PN544_JEWEL_RAW_CMD, skb->data, skb->len, cb, cb_context); case PN544_RF_READER_NFCIP1_INITIATOR_GATE: - *skb_push(skb, 1) = 0; + *(u8 *)skb_push(skb, 1) = 0; return nfc_hci_send_event(hdev, target->hci_reader_gate, PN544_HCI_EVT_SND_DATA, skb->data, @@ -680,7 +680,7 @@ static int pn544_hci_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb) int r; /* Set default false for multiple information chaining */ - *skb_push(skb, 1) = 0; + *(u8 *)skb_push(skb, 1) = 0; r = nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, PN544_HCI_EVT_SND_DATA, skb->data, skb->len); -- cgit v1.2.3-59-g8ed1b