linux-kernel - [PATCH] genirq: switch /proc/irq/*/spurious to seq

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Date:	Fri, 28 Aug 2009 22:19:33 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] genirq: switch /proc/irq/*/spurious to seq_file

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 kernel/irq/proc.c |   28 ++++++++++++++++++----------
 1 file changed, 18 insertions(+), 10 deletions(-)

--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -148,18 +148,30 @@ static const struct file_operations default_affinity_proc_fops = {
 };
 #endif
 
-static int irq_spurious_read(char *page, char **start, off_t off,
-				  int count, int *eof, void *data)
+static int irq_spurious_proc_show(struct seq_file *m, void *v)
 {
-	struct irq_desc *desc = irq_to_desc((long) data);
-	return sprintf(page, "count %u\n"
+	struct irq_desc *desc = irq_to_desc((long) m->private);
+	seq_printf(m, "count %u\n"
 			     "unhandled %u\n"
 			     "last_unhandled %u ms\n",
 			desc->irq_count,
 			desc->irqs_unhandled,
 			jiffies_to_msecs(desc->last_unhandled));
+	return 0;
 }
 
+static int irq_spurious_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, irq_spurious_proc_show, NULL);
+}
+
+static const struct file_operations irq_spurious_proc_fops = {
+	.open		= irq_spurious_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
 #define MAX_NAMELEN 128
 
 static int name_unique(unsigned int irq, struct irqaction *new_action)
@@ -204,7 +216,6 @@ void register_handler_proc(unsigned int irq, struct irqaction *action)
 void register_irq_proc(unsigned int irq, struct irq_desc *desc)
 {
 	char name [MAX_NAMELEN];
-	struct proc_dir_entry *entry;
 
 	if (!root_irq_dir || (desc->chip == &no_irq_chip) || desc->dir)
 		return;
@@ -221,11 +232,8 @@ void register_irq_proc(unsigned int irq, struct irq_desc *desc)
 			 &irq_affinity_proc_fops, (void *)(long)irq);
 #endif
 
-	entry = create_proc_entry("spurious", 0444, desc->dir);
-	if (entry) {
-		entry->data = (void *)(long)irq;
-		entry->read_proc = irq_spurious_read;
-	}
+	proc_create_data("spurious", 0444, desc->dir,
+			 &irq_spurious_proc_fops, (void *)(long)irq);
 }
 
 #undef MAX_NAMELEN
--
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