From 4df864c1d9afb46e2461a9f808d9f11a42d31bad Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 16 Jun 2017 14:29:21 +0200 Subject: networking: make skb_put & friends 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 (skb_put, __skb_put and pskb_put) 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_put, __skb_put }; @@ - *(fn(SKB, LEN)) + *(u8 *)fn(SKB, LEN) @@ expression E, SKB, LEN; identifier fn = { skb_put, __skb_put }; type T; @@ - E = ((T *)(fn(SKB, LEN))) + E = fn(SKB, LEN) which actually doesn't cover pskb_put since there are only three users overall. A handful of stragglers were converted manually, notably a macro in drivers/isdn/i4l/isdn_bsdcomp.c and, oddly enough, one of the many instances in net/bluetooth/hci_sock.c. In the former file, I also had to fix one whitespace problem spatch introduced. Signed-off-by: Johannes Berg Signed-off-by: David S. Miller --- net/mac80211/tdls.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'net/mac80211/tdls.c') diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c index 86740670102d..709ef02fe67e 100644 --- a/net/mac80211/tdls.c +++ b/net/mac80211/tdls.c @@ -49,7 +49,7 @@ static void ieee80211_tdls_add_ext_capab(struct ieee80211_sub_if_data *sdata, !ifmgd->tdls_wider_bw_prohibited; struct ieee80211_supported_band *sband = ieee80211_get_sband(sdata); bool vht = sband && sband->vht_cap.vht_supported; - u8 *pos = (void *)skb_put(skb, 10); + u8 *pos = skb_put(skb, 10); *pos++ = WLAN_EID_EXT_CAPABILITY; *pos++ = 8; /* len */ @@ -168,7 +168,7 @@ static void ieee80211_tdls_add_oper_classes(struct ieee80211_sub_if_data *sdata, static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb) { - u8 *pos = (void *)skb_put(skb, 3); + u8 *pos = skb_put(skb, 3); *pos++ = WLAN_EID_BSS_COEX_2040; *pos++ = 1; /* len */ @@ -209,7 +209,7 @@ static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata, rsp_addr = sdata->vif.addr; } - lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie)); + lnkid = skb_put(skb, sizeof(struct ieee80211_tdls_lnkie)); lnkid->ie_type = WLAN_EID_LINK_ID; lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2; @@ -223,7 +223,7 @@ static void ieee80211_tdls_add_aid(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) { struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; - u8 *pos = (void *)skb_put(skb, 4); + u8 *pos = skb_put(skb, 4); *pos++ = WLAN_EID_AID; *pos++ = 2; /* len */ @@ -745,7 +745,7 @@ ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev, struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); struct ieee80211_tdls_data *tf; - tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u)); + tf = skb_put(skb, offsetof(struct ieee80211_tdls_data, u)); memcpy(tf->da, peer, ETH_ALEN); memcpy(tf->sa, sdata->vif.addr, ETH_ALEN); -- cgit v1.2.3