linux-kernel - [PATCH 1/5] irq: generic-chip: provide irq_free_generic

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Date:   Wed, 31 May 2017 18:06:56 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <marc.zyngier@....com>,
        Jonathan Corbet <corbet@....net>
Cc:     linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        Bartosz Golaszewski <brgl@...ev.pl>
Subject: [PATCH 1/5] irq: generic-chip: provide irq_free_generic_chip()

Currently there's no way for users of irq_alloc_generic_chip() to free
the allocated memory other than calling kfree() manually on the
returned pointer. This may lead to errors if the internals of
irq_alloc_generic_chip() ever change. Provide a routine to free the
generic chip.

Signed-off-by: Bartosz Golaszewski <brgl@...ev.pl>
---
 include/linux/irq.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index f887351..cba41a4 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -22,6 +22,7 @@
 #include <linux/topology.h>
 #include <linux/wait.h>
 #include <linux/io.h>
+#include <linux/slab.h>
 
 #include <asm/irq.h>
 #include <asm/ptrace.h>
@@ -967,6 +968,11 @@ int __irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,
 					 handler, clr, set, flags);	\
 })
 
+static inline void irq_free_generic_chip(struct irq_chip_generic *gc)
+{
+	kfree(gc);
+}
+
 static inline struct irq_chip_type *irq_data_get_chip_type(struct irq_data *d)
 {
 	return container_of(d->chip, struct irq_chip_type, chip);
-- 
2.9.3