genirq/debugfs: Remove pointless NULL pointer check

debugfs_remove() has it's own NULL pointer check. Remove the conditional
and make irq_remove_debugfs_entry() an inline helper
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

kernel/irq/debugfs.c

@@ -3,7 +3,6 @@
  *
  * This file is licensed under the GPL V2.
  */
-#include <linux/debugfs.h>
 #include <linux/irqdomain.h>
 #include <linux/irq.h>
 
@@ -191,12 +190,6 @@ void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *desc)
 						 &dfs_irq_ops);
 }
 
-void irq_remove_debugfs_entry(struct irq_desc *desc)
-{
-	if (desc->debugfs_file)
-		debugfs_remove(desc->debugfs_file);
-}
-
 static int __init irq_debugfs_init(void)
 {
 	struct dentry *root_dir;

kernel/irq/internals.h

@@ -318,8 +318,13 @@ static inline bool irq_fixup_move_pending(struct irq_desc *desc, bool fclear)
 #endif /* !CONFIG_GENERIC_PENDING_IRQ */
 
 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS
+#include <linux/debugfs.h>
+
 void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *desc);
-void irq_remove_debugfs_entry(struct irq_desc *desc);
+static inline void irq_remove_debugfs_entry(struct irq_desc *desc)
+{
+	debugfs_remove(desc->debugfs_file);
+}
 # ifdef CONFIG_IRQ_DOMAIN
 void irq_domain_debugfs_init(struct dentry *root);
 # else