Merge tag 'uninit-macro-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull uninitialized_var() macro removal from Kees Cook:
 "This is long overdue, and has hidden too many bugs over the years. The
  series has several "by hand" fixes, and then a trivial treewide
  replacement.

   - Clean up non-trivial uses of uninitialized_var()

   - Update documentation and checkpatch for uninitialized_var() removal

   - Treewide removal of uninitialized_var()"

* tag 'uninit-macro-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  compiler: Remove uninitialized_var() macro
  treewide: Remove uninitialized_var() usage
  checkpatch: Remove awareness of uninitialized_var() macro
  mm/debug_vm_pgtable: Remove uninitialized_var() usage
  f2fs: Eliminate usage of uninitialized_var() macro
  media: sur40: Remove uninitialized_var() usage
  KVM: PPC: Book3S PR: Remove uninitialized_var() usage
  clk: spear: Remove uninitialized_var() usage
  clk: st: Remove uninitialized_var() usage
  spi: davinci: Remove uninitialized_var() usage
  ide: Remove uninitialized_var() usage
  rtlwifi: rtl8192cu: Remove uninitialized_var() usage
  b43: Remove uninitialized_var() usage
  drbd: Remove uninitialized_var() usage
  x86/mm/numa: Remove uninitialized_var() usage
  docs: deprecated.rst: Add uninitialized_var()

net/dccp/options.c

@@ -56,7 +56,7 @@ int dccp_parse_options(struct sock *sk, struct dccp_request_sock *dreq,
 					(dh->dccph_doff * 4);
 	struct dccp_options_received *opt_recv = &dp->dccps_options_received;
 	unsigned char opt, len;
-	unsigned char *uninitialized_var(value);
+	unsigned char *value;
 	u32 elapsed_time;
 	__be32 opt_val;
 	int rc;

net/ipv4/netfilter/nf_socket_ipv4.c

@@ -84,11 +84,11 @@ nf_socket_get_sock_v4(struct net *net, struct sk_buff *skb, const int doff,
 struct sock *nf_sk_lookup_slow_v4(struct net *net, const struct sk_buff *skb,
 				  const struct net_device *indev)
 {
-	__be32 uninitialized_var(daddr), uninitialized_var(saddr);
-	__be16 uninitialized_var(dport), uninitialized_var(sport);
+	__be32 daddr, saddr;
+	__be16 dport, sport;
 	const struct iphdr *iph = ip_hdr(skb);
 	struct sk_buff *data_skb = NULL;
-	u8 uninitialized_var(protocol);
+	u8 protocol;
 #if IS_ENABLED(CONFIG_NF_CONNTRACK)
 	enum ip_conntrack_info ctinfo;
 	struct nf_conn const *ct;

net/ipv6/ip6_flowlabel.c

@@ -535,7 +535,7 @@ int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq,
 
 int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen)
 {
-	int uninitialized_var(err);
+	int err;
 	struct net *net = sock_net(sk);
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct in6_flowlabel_req freq;

net/ipv6/netfilter/nf_socket_ipv6.c

@@ -97,7 +97,7 @@ nf_socket_get_sock_v6(struct net *net, struct sk_buff *skb, int doff,
 struct sock *nf_sk_lookup_slow_v6(struct net *net, const struct sk_buff *skb,
 				  const struct net_device *indev)
 {
-	__be16 uninitialized_var(dport), uninitialized_var(sport);
+	__be16 dport, sport;
 	const struct in6_addr *daddr = NULL, *saddr = NULL;
 	struct ipv6hdr *iph = ipv6_hdr(skb);
 	struct sk_buff *data_skb = NULL;

net/netfilter/nf_conntrack_ftp.c

@@ -382,7 +382,7 @@ static int help(struct sk_buff *skb,
 	int ret;
 	u32 seq;
 	int dir = CTINFO2DIR(ctinfo);
-	unsigned int uninitialized_var(matchlen), uninitialized_var(matchoff);
+	unsigned int matchlen, matchoff;
 	struct nf_ct_ftp_master *ct_ftp_info = nfct_help_data(ct);
 	struct nf_conntrack_expect *exp;
 	union nf_inet_addr *daddr;

net/netfilter/nfnetlink_log.c

@@ -689,7 +689,7 @@ nfulnl_log_packet(struct net *net,
 	struct nfnl_log_net *log = nfnl_log_pernet(net);
 	const struct nfnl_ct_hook *nfnl_ct = NULL;
 	struct nf_conn *ct = NULL;
-	enum ip_conntrack_info uninitialized_var(ctinfo);
+	enum ip_conntrack_info ctinfo;
 
 	if (li_user && li_user->type == NF_LOG_TYPE_ULOG)
 		li = li_user;

net/netfilter/nfnetlink_queue.c

@@ -388,7 +388,7 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
 	struct net_device *indev;
 	struct net_device *outdev;
 	struct nf_conn *ct = NULL;
-	enum ip_conntrack_info uninitialized_var(ctinfo);
+	enum ip_conntrack_info ctinfo;
 	struct nfnl_ct_hook *nfnl_ct;
 	bool csum_verify;
 	char *secdata = NULL;
@@ -1168,7 +1168,7 @@ static int nfqnl_recv_verdict(struct net *net, struct sock *ctnl,
 	struct nfqnl_instance *queue;
 	unsigned int verdict;
 	struct nf_queue_entry *entry;
-	enum ip_conntrack_info uninitialized_var(ctinfo);
+	enum ip_conntrack_info ctinfo;
 	struct nfnl_ct_hook *nfnl_ct;
 	struct nf_conn *ct = NULL;
 	struct nfnl_queue_net *q = nfnl_queue_pernet(net);

net/sched/cls_flow.c

@@ -225,7 +225,7 @@ static u32 flow_get_skgid(const struct sk_buff *skb)
 
 static u32 flow_get_vlan_tag(const struct sk_buff *skb)
 {
-	u16 uninitialized_var(tag);
+	u16 tag;
 
 	if (vlan_get_tag(skb, &tag) < 0)
 		return 0;

net/sched/sch_cake.c

@@ -1692,7 +1692,7 @@ static s32 cake_enqueue(struct sk_buff *skb, struct Qdisc *sch,
 {
 	struct cake_sched_data *q = qdisc_priv(sch);
 	int len = qdisc_pkt_len(skb);
-	int uninitialized_var(ret);
+	int ret;
 	struct sk_buff *ack = NULL;
 	ktime_t now = ktime_get();
 	struct cake_tin_data *b;

net/sched/sch_cbq.c

@@ -360,7 +360,7 @@ cbq_enqueue(struct sk_buff *skb, struct Qdisc *sch,
 	    struct sk_buff **to_free)
 {
 	struct cbq_sched_data *q = qdisc_priv(sch);
-	int uninitialized_var(ret);
+	int ret;
 	struct cbq_class *cl = cbq_classify(skb, sch, &ret);
 
 #ifdef CONFIG_NET_CLS_ACT

net/sched/sch_fq_codel.c

@@ -187,7 +187,7 @@ static int fq_codel_enqueue(struct sk_buff *skb, struct Qdisc *sch,
 	struct fq_codel_sched_data *q = qdisc_priv(sch);
 	unsigned int idx, prev_backlog, prev_qlen;
 	struct fq_codel_flow *flow;
-	int uninitialized_var(ret);
+	int ret;
 	unsigned int pkt_len;
 	bool memory_limited;
 

net/sched/sch_fq_pie.c

@@ -130,7 +130,7 @@ static int fq_pie_qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch,
 {
 	struct fq_pie_sched_data *q = qdisc_priv(sch);
 	struct fq_pie_flow *sel_flow;
-	int uninitialized_var(ret);
+	int ret;
 	u8 memory_limited = false;
 	u8 enqueue = false;
 	u32 pkt_len;

net/sched/sch_hfsc.c

@@ -1533,7 +1533,7 @@ hfsc_enqueue(struct sk_buff *skb, struct Qdisc *sch, struct sk_buff **to_free)
 {
 	unsigned int len = qdisc_pkt_len(skb);
 	struct hfsc_class *cl;
-	int uninitialized_var(err);
+	int err;
 	bool first;
 
 	cl = hfsc_classify(skb, sch, &err);

net/sched/sch_htb.c

@@ -579,7 +579,7 @@ static inline void htb_deactivate(struct htb_sched *q, struct htb_class *cl)
 static int htb_enqueue(struct sk_buff *skb, struct Qdisc *sch,
 		       struct sk_buff **to_free)
 {
-	int uninitialized_var(ret);
+	int ret;
 	unsigned int len = qdisc_pkt_len(skb);
 	struct htb_sched *q = qdisc_priv(sch);
 	struct htb_class *cl = htb_classify(skb, sch, &ret);

net/sched/sch_sfq.c

@@ -349,7 +349,7 @@ sfq_enqueue(struct sk_buff *skb, struct Qdisc *sch, struct sk_buff **to_free)
 	unsigned int hash, dropped;
 	sfq_index x, qlen;
 	struct sfq_slot *slot;
-	int uninitialized_var(ret);
+	int ret;
 	struct sk_buff *head;
 	int delta;
 

net/sunrpc/svcsock.c

@@ -564,7 +564,7 @@ static int svc_udp_sendto(struct svc_rqst *rqstp)
 		.msg_control	= cmh,
 		.msg_controllen	= sizeof(buffer),
 	};
-	unsigned int uninitialized_var(sent);
+	unsigned int sent;
 	int err;
 
 	svc_udp_release_rqst(rqstp);
@@ -1081,7 +1081,7 @@ static int svc_tcp_sendto(struct svc_rqst *rqstp)
 	struct msghdr msg = {
 		.msg_flags	= 0,
 	};
-	unsigned int uninitialized_var(sent);
+	unsigned int sent;
 	int err;
 
 	svc_tcp_release_rqst(rqstp);

net/sunrpc/xprtsock.c

@@ -496,8 +496,8 @@ xs_read_stream_request(struct sock_xprt *transport, struct msghdr *msg,
 		int flags, struct rpc_rqst *req)
 {
 	struct xdr_buf *buf = &req->rq_private_buf;
-	size_t want, uninitialized_var(read);
-	ssize_t uninitialized_var(ret);
+	size_t want, read;
+	ssize_t ret;
 
 	xs_read_header(transport, buf);
 
@@ -844,7 +844,7 @@ static int xs_local_send_request(struct rpc_rqst *req)
 	struct msghdr msg = {
 		.msg_flags	= XS_SENDMSG_FLAGS,
 	};
-	unsigned int uninitialized_var(sent);
+	unsigned int sent;
 	int status;
 
 	/* Close the stream if the previous transmission was incomplete */
@@ -915,7 +915,7 @@ static int xs_udp_send_request(struct rpc_rqst *req)
 		.msg_namelen	= xprt->addrlen,
 		.msg_flags	= XS_SENDMSG_FLAGS,
 	};
-	unsigned int uninitialized_var(sent);
+	unsigned int sent;
 	int status;
 
 	xs_pktdump("packet data:",
@@ -999,7 +999,7 @@ static int xs_tcp_send_request(struct rpc_rqst *req)
 		.msg_flags	= XS_SENDMSG_FLAGS,
 	};
 	bool vm_wait = false;
-	unsigned int uninitialized_var(sent);
+	unsigned int sent;
 	int status;
 
 	/* Close the stream if the previous transmission was incomplete */

net/tls/tls_sw.c

@@ -670,7 +670,7 @@ static int tls_push_record(struct sock *sk, int flags,
 	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx);
 	struct tls_rec *rec = ctx->open_rec, *tmp = NULL;
-	u32 i, split_point, uninitialized_var(orig_end);
+	u32 i, split_point, orig_end;
 	struct sk_msg *msg_pl, *msg_en;
 	struct aead_request *req;
 	bool split;