irqdomain: Re-use DEFINE_SHOW_ATTRIBUTE() macro

...instead of open coding file operations followed by custom ->open()
callbacks per each attribute.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index e6a9c36470ee93ff524fb93e24fdfced8b057582..82b8b18ee1ebcdf19e873b5bb3d4ab9f2748f539 100644 (file)
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -1726,25 +1726,14 @@ static int irq_domain_debug_show(struct seq_file *m, void *p)
        irq_domain_debug_show_one(m, d, 0);
        return 0;
 }
-
-static int irq_domain_debug_open(struct inode *inode, struct file *file)
-{
-       return single_open(file, irq_domain_debug_show, inode->i_private);
-}
-
-static const struct file_operations dfs_domain_ops = {
-       .open           = irq_domain_debug_open,
-       .read           = seq_read,
-       .llseek         = seq_lseek,
-       .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(irq_domain_debug);
 
 static void debugfs_add_domain_dir(struct irq_domain *d)
 {
        if (!d->name || !domain_dir || d->debugfs_file)
                return;
        d->debugfs_file = debugfs_create_file(d->name, 0444, domain_dir, d,
-                                             &dfs_domain_ops);
+                                             &irq_domain_debug_fops);
 }
 
 static void debugfs_remove_domain_dir(struct irq_domain *d)
@@ -1760,7 +1749,8 @@ void __init irq_domain_debugfs_init(struct dentry *root)
        if (!domain_dir)
                return;
 
-       debugfs_create_file("default", 0444, domain_dir, NULL, &dfs_domain_ops);
+       debugfs_create_file("default", 0444, domain_dir, NULL,
+                           &irq_domain_debug_fops);
        mutex_lock(&irq_domain_mutex);
        list_for_each_entry(d, &irq_domain_list, link)
                debugfs_add_domain_dir(d);