net: in_irq() cleanup

Replace the obsolete and ambiguos macro in_irq() with new
macro in_hardirq().
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Link: https://lore.kernel.org/r/20210813145749.86512-1-changbin.du@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

include/linux/netdevice.h

@@ -3956,7 +3956,7 @@ void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
 /*
  * It is not allowed to call kfree_skb() or consume_skb() from hardware
  * interrupt context or with hardware interrupts being disabled.
- * (in_irq() || irqs_disabled())
+ * (in_hardirq() || irqs_disabled())
  *
  * We provide four helpers that can be used in following contexts :
  *

net/core/bpf_sk_storage.c

@@ -416,7 +416,7 @@ static bool bpf_sk_storage_tracing_allowed(const struct bpf_prog *prog)
 BPF_CALL_4(bpf_sk_storage_get_tracing, struct bpf_map *, map, struct sock *, sk,
 	   void *, value, u64, flags)
 {
-	if (in_irq() || in_nmi())
+	if (in_hardirq() || in_nmi())
 		return (unsigned long)NULL;
 
 	return (unsigned long)____bpf_sk_storage_get(map, sk, value, flags);
@@ -425,7 +425,7 @@ BPF_CALL_4(bpf_sk_storage_get_tracing, struct bpf_map *, map, struct sock *, sk,
 BPF_CALL_2(bpf_sk_storage_delete_tracing, struct bpf_map *, map,
 	   struct sock *, sk)
 {
-	if (in_irq() || in_nmi())
+	if (in_hardirq() || in_nmi())
 		return -EPERM;
 
 	return ____bpf_sk_storage_delete(map, sk);

net/core/dev.c

@@ -3107,7 +3107,7 @@ EXPORT_SYMBOL(__dev_kfree_skb_irq);
 
 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason)
 {
-	if (in_irq() || irqs_disabled())
+	if (in_hardirq() || irqs_disabled())
 		__dev_kfree_skb_irq(skb, reason);
 	else
 		dev_kfree_skb(skb);

net/core/skbuff.c

@@ -156,7 +156,7 @@ void *__netdev_alloc_frag_align(unsigned int fragsz, unsigned int align_mask)
 	void *data;
 
 	fragsz = SKB_DATA_ALIGN(fragsz);
-	if (in_irq() || irqs_disabled()) {
+	if (in_hardirq() || irqs_disabled()) {
 		nc = this_cpu_ptr(&netdev_alloc_cache);
 		data = page_frag_alloc_align(nc, fragsz, GFP_ATOMIC, align_mask);
 	} else {
@@ -502,7 +502,7 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len,
 	if (sk_memalloc_socks())
 		gfp_mask |= __GFP_MEMALLOC;
 
-	if (in_irq() || irqs_disabled()) {
+	if (in_hardirq() || irqs_disabled()) {
 		nc = this_cpu_ptr(&netdev_alloc_cache);
 		data = page_frag_alloc(nc, len, gfp_mask);
 		pfmemalloc = nc->pfmemalloc;
@@ -724,7 +724,7 @@ void skb_release_head_state(struct sk_buff *skb)
 {
 	skb_dst_drop(skb);
 	if (skb->destructor) {
-		WARN_ON(in_irq());
+		WARN_ON(in_hardirq());
 		skb->destructor(skb);
 	}
 #if IS_ENABLED(CONFIG_NF_CONNTRACK)

net/nfc/rawsock.c

@@ -140,7 +140,7 @@ static void rawsock_data_exchange_complete(void *context, struct sk_buff *skb,
 {
 	struct sock *sk = (struct sock *) context;
 
-	BUG_ON(in_irq());
+	BUG_ON(in_hardirq());
 
 	pr_debug("sk=%p err=%d\n", sk, err);