add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/xen/evtchn.c
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@@ -83,7 +83,7 @@
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 struct user_evtchn {
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 	struct rb_node node;
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 	struct per_user_data *user;
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-	unsigned port;
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+	evtchn_port_t port;
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 	bool enabled;
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 };
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@@ -138,7 +138,8 @@
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 	kfree(evtchn);
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 }
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-static struct user_evtchn *find_evtchn(struct per_user_data *u, unsigned port)
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+static struct user_evtchn *find_evtchn(struct per_user_data *u,
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+				       evtchn_port_t port)
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 {
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 	struct rb_node *node = u->evtchns.rb_node;
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@@ -163,7 +164,7 @@
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 	struct per_user_data *u = evtchn->user;
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 	WARN(!evtchn->enabled,
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-	     "Interrupt for port %d, but apparently not enabled; per-user %p\n",
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+	     "Interrupt for port %u, but apparently not enabled; per-user %p\n",
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 	     evtchn->port, u);
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 	evtchn->enabled = false;
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@@ -285,7 +286,7 @@
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 	mutex_lock(&u->bind_mutex);
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 	for (i = 0; i < (count/sizeof(evtchn_port_t)); i++) {
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-		unsigned port = kbuf[i];
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+		evtchn_port_t port = kbuf[i];
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 		struct user_evtchn *evtchn;
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 		evtchn = find_evtchn(u, port);
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@@ -360,7 +361,7 @@
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 	return 0;
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 }
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-static int evtchn_bind_to_user(struct per_user_data *u, int port)
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+static int evtchn_bind_to_user(struct per_user_data *u, evtchn_port_t port)
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 {
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 	struct user_evtchn *evtchn;
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 	struct evtchn_close close;
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@@ -422,7 +423,7 @@
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 static DEFINE_PER_CPU(int, bind_last_selected_cpu);
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-static void evtchn_bind_interdom_next_vcpu(int evtchn)
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+static void evtchn_bind_interdom_next_vcpu(evtchn_port_t evtchn)
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 {
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 	unsigned int selected_cpu, irq;
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 	struct irq_desc *desc;
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@@ -663,7 +664,7 @@
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 	filp->private_data = u;
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-	return nonseekable_open(inode, filp);
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+	return stream_open(inode, filp);
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 }
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 static int evtchn_release(struct inode *inode, struct file *filp)