irqdomain: Remove powerpc dependency from debugfs file

The debugfs code is really generic for all platforms.  This patch removes the
powerpc-specific directory reference and makes it available to all
architectures.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

2 files changed, 14 insertions, 4 deletions

diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
index 5a38bf4de641..d8e323d12496 100644
--- a/kernel/irq/Kconfig
+++ b/kernel/irq/Kconfig
@@ -56,6 +56,16 @@ config GENERIC_IRQ_CHIP
 config IRQ_DOMAIN
         bool
 
+config IRQ_DOMAIN_DEBUG
+        bool "Expose hardware/virtual IRQ mapping via debugfs"
+        depends on IRQ_DOMAIN && DEBUG_FS
+        help
+          This option will show the mapping relationship between hardware irq
+          numbers and Linux irq numbers. The mapping is exposed via debugfs
+          in the file "virq_mapping".
+
+          If you don't know what this means you don't need it.
+
 # Support forced irq threading
 config IRQ_FORCED_THREADING
        bool
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index af48e59bc2ff..3601f3fbf67c 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -632,7 +632,7 @@ unsigned int irq_linear_revmap(struct irq_domain *domain,
         return revmap[hwirq];
 }
 
-#ifdef CONFIG_VIRQ_DEBUG
+#ifdef CONFIG_IRQ_DOMAIN_DEBUG
 static int virq_debug_show(struct seq_file *m, void *private)
 {
         unsigned long flags;
@@ -668,7 +668,7 @@ static int virq_debug_show(struct seq_file *m, void *private)
                         data = irq_desc_get_chip_data(desc);
                         seq_printf(m, "0x%16p  ", data);
 
-                        if (desc->irq_data.domain->of_node)
+                        if (desc->irq_data.domain && desc->irq_data.domain->of_node)
                                 p = desc->irq_data.domain->of_node->full_name;
                         else
                                 p = none;
@@ -695,14 +695,14 @@ static const struct file_operations virq_debug_fops = {
 
 static int __init irq_debugfs_init(void)
 {
-        if (debugfs_create_file("virq_mapping", S_IRUGO, powerpc_debugfs_root,
+        if (debugfs_create_file("irq_domain_mapping", S_IRUGO, NULL,
                                  NULL, &virq_debug_fops) == NULL)
                 return -ENOMEM;
 
         return 0;
 }
 __initcall(irq_debugfs_init);
-#endif /* CONFIG_VIRQ_DEBUG */
+#endif /* CONFIG_IRQ_DOMAIN_DEBUG */
 
 int irq_domain_simple_map(struct irq_domain *d, unsigned int irq,
                           irq_hw_number_t hwirq)