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From 5902b315d4061ebbe73a62c52e6d3b618066cebc Mon Sep 17 00:00:00 2001
From: Con Kolivas <kernel@kolivas.org>
Date: Wed, 7 Dec 2016 21:13:16 +1100
Subject: [PATCH 13/16] Make threaded IRQs optionally the default which can be
disabled.
---
kernel/irq/Kconfig | 14 ++++++++++++++
kernel/irq/manage.c | 10 ++++++++++
2 files changed, 24 insertions(+)
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
index a117adf7084b..0984c54fd4e9 100644
--- a/kernel/irq/Kconfig
+++ b/kernel/irq/Kconfig
@@ -111,6 +111,20 @@ config IRQ_DOMAIN_DEBUG
config IRQ_FORCED_THREADING
bool
+config FORCE_IRQ_THREADING
+ bool "Make IRQ threading compulsory"
+ depends on IRQ_FORCED_THREADING
+ default y
+ ---help---
+
+ Make IRQ threading mandatory for any IRQ handlers that support it
+ instead of being optional and requiring the threadirqs kernel
+ parameter. Instead they can be optionally disabled with the
+ nothreadirqs kernel parameter.
+
+ Enable if you are building for a desktop or low latency system,
+ otherwise say N.
+
config SPARSE_IRQ
bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
---help---
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 4bff6a10ae8e..5a6df0dd23c4 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -24,7 +24,17 @@
#include "internals.h"
#ifdef CONFIG_IRQ_FORCED_THREADING
+#ifdef CONFIG_FORCE_IRQ_THREADING
+__read_mostly bool force_irqthreads = true;
+#else
__read_mostly bool force_irqthreads;
+#endif
+static int __init setup_noforced_irqthreads(char *arg)
+{
+ force_irqthreads = false;
+ return 0;
+}
+early_param("nothreadirqs", setup_noforced_irqthreads);
static int __init setup_forced_irqthreads(char *arg)
{
--
2.11.0
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