summaryrefslogtreecommitdiffstats
path: root/include
diff options
context:
space:
mode:
authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2015-10-20 15:23:51 +0200
committerThomas Gleixner <tglx@linutronix.de>2015-12-08 12:53:29 +0100
commitf0cb32207307e9d7b3ee8117078b7a37f8d0166e (patch)
tree1c9f4d3b4286147fc70b6221ac980e42a67713a9 /include
parenta946e8c717f9355d1abd5408ed0adc0002d1aed1 (diff)
downloadop-kernel-dev-f0cb32207307e9d7b3ee8117078b7a37f8d0166e.zip
op-kernel-dev-f0cb32207307e9d7b3ee8117078b7a37f8d0166e.tar.gz
genirq: Implement irq_percpu_is_enabled()
Certain interrupt controller drivers have a register set that does not make it easy to save/restore the mask of enabled/disabled interrupts at suspend/resume time. At resume time, such drivers rely on the core kernel irq subsystem to tell whether such or such interrupt is enabled or not, in order to restore the proper state in the interrupt controller register. While the irqd_irq_disabled() provides the relevant information for global interrupts, there is no similar function to query the enabled/disabled state of a per-CPU interrupt. Therefore, this commit complements the percpu_irq API with an irq_percpu_is_enabled() function. [ tglx: Simplified the implementation and added kerneldoc ] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Tawfik Bayouk <tawfik@marvell.com> Cc: Nadav Haklai <nadavh@marvell.com> Cc: Lior Amsalem <alior@marvell.com> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Cc: Gregory Clement <gregory.clement@free-electrons.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Link: http://lkml.kernel.org/r/1445347435-2333-2-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include')
-rw-r--r--include/linux/interrupt.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index ad16809..cb30edb 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -195,6 +195,7 @@ extern void disable_irq(unsigned int irq);
extern void disable_percpu_irq(unsigned int irq);
extern void enable_irq(unsigned int irq);
extern void enable_percpu_irq(unsigned int irq, unsigned int type);
+extern bool irq_percpu_is_enabled(unsigned int irq);
extern void irq_wake_thread(unsigned int irq, void *dev_id);
/* The following three functions are for the core kernel use only. */
OpenPOWER on IntegriCloud