[tip:irq/core] irq/generic-chip: Provide irq_free_generic_chip()

From: tip-bot for Bartosz Golaszewski
Date: Wed Jun 21 2017 - 10:02:16 EST

Commit-ID: 707188f5f2421a304324e6ef3aaf4413cfab0f3d
Gitweb: http://git.kernel.org/tip/707188f5f2421a304324e6ef3aaf4413cfab0f3d
Author: Bartosz Golaszewski <brgl@xxxxxxxx>
AuthorDate: Wed, 31 May 2017 18:06:56 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Wed, 21 Jun 2017 15:53:10 +0200

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@xxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Acked-by: Marc Zyngier <marc.zyngier@xxxxxxx>
Cc: linux-doc@xxxxxxxxxxxxxxx
Cc: Jonathan Corbet <corbet@xxxxxxx>
Link: http://lkml.kernel.org/r/1496246820-13250-2-git-send-email-brgl@xxxxxxxx

include/linux/irq.h | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 94d1ad6..2c957fe 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>
@@ -973,6 +974,11 @@ 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);