From 31278bc163a0fe3239a4ac4047e4968fad17fc6e Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Sun, 4 Feb 2018 16:32:14 -0600
Subject: [PATCH] Kconfigs:  Add comments and a dependency.

---
 arch/Kconfig  | 5 +++++
 sched/Kconfig | 1 +
 2 files changed, 6 insertions(+)

diff --git a/arch/Kconfig b/arch/Kconfig
index d31542a74d..f1bd17077a 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -213,6 +213,11 @@ config ARCH_HAVE_RTC_SUBSECONDS
 config ARCH_GLOBAL_IRQDISABLE
 	bool
 	default n
+	---help---
+		Indicates that disabling interrupts on one CPU will either (1) disable
+		all interrupts globally on all CPUs, or (2) will disable interprocessor
+		interrupts as well so that no context switches can occur on the CPU
+		that disabled "local" interrupts.
 
 config ARCH_USE_MMU
 	bool "Enable MMU"
diff --git a/sched/Kconfig b/sched/Kconfig
index 64af6daf10..f6ea30c099 100644
--- a/sched/Kconfig
+++ b/sched/Kconfig
@@ -252,6 +252,7 @@ config SPINLOCK
 config SPINLOCK_IRQ
 	bool "Support Spinlocks with IRQ control"
 	default n
+	depends on ARCH_GLOBAL_IRQDISABLE
 	---help---
 		Enables suppport for spinlocks with IRQ control. This feature can be
 		used to protect data in SMP mode.