proc: move /proc/interrupts boilerplate code to fs/proc/interrupts.c

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

1 files changed, 53 insertions, 0 deletions

diff --git a/fs/proc/interrupts.c b/fs/proc/interrupts.c
new file mode 100644
index 000000000000..05029c0e2f24
--- /dev/null
+++ b/fs/proc/interrupts.c
@@ -0,0 +1,53 @@
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irqnr.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+/*
+ * /proc/interrupts
+ */
+static void *int_seq_start(struct seq_file *f, loff_t *pos)
+{
+        return (*pos <= nr_irqs) ? pos : NULL;
+}
+
+static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
+{
+        (*pos)++;
+        if (*pos > nr_irqs)
+                return NULL;
+        return pos;
+}
+
+static void int_seq_stop(struct seq_file *f, void *v)
+{
+        /* Nothing to do */
+}
+
+static const struct seq_operations int_seq_ops = {
+        .start = int_seq_start,
+        .next  = int_seq_next,
+        .stop  = int_seq_stop,
+        .show  = show_interrupts
+};
+
+static int interrupts_open(struct inode *inode, struct file *filp)
+{
+        return seq_open(filp, &int_seq_ops);
+}
+
+static const struct file_operations proc_interrupts_operations = {
+        .open           = interrupts_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+
+static int __init proc_interrupts_init(void)
+{
+        proc_create("interrupts", 0, NULL, &proc_interrupts_operations);
+        return 0;
+}
+module_init(proc_interrupts_init);