linux-kernel - [PATCH 3.18 19/50] ARM: 8510/1: rework ARM_CPU

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Message-Id: <20190401170043.576990744@linuxfoundation.org>
Date:   Mon,  1 Apr 2019 19:03:02 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Nicolas Pitre <nico@...xnic.net>,
        Russell King <rmk+kernel@....linux.org.uk>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 3.18 19/50] ARM: 8510/1: rework ARM_CPU_SUSPEND dependencies

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit 1b9bdf5c1661873a10e193b8cbb803a87fe5c4a1 ]

The code enabled by the ARM_CPU_SUSPEND config option is used by
kernel subsystems for purposes that go beyond system suspend so its
config entry should be augmented to take more default options into
account and avoid forcing its selection to prevent dependencies
override.

To achieve this goal, this patch reworks the ARM_CPU_SUSPEND config
entry and updates its default config value (by adding the BL_SWITCHER
option to it) and its dependencies (ARCH_SUSPEND_POSSIBLE), so that the
symbol is still selected by default by the subsystems requiring it and
at the same time enforcing the dependencies correctly.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc: Nicolas Pitre <nico@...xnic.net>
Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/Kconfig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index bd3a806df001..ee9acbfa7a1d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1433,7 +1433,6 @@ config BIG_LITTLE
 config BL_SWITCHER
 	bool "big.LITTLE switcher support"
 	depends on BIG_LITTLE && MCPM && HOTPLUG_CPU && ARM_GIC
-	select ARM_CPU_SUSPEND
 	select CPU_PM
 	help
 	  The big.LITTLE "switcher" provides the core functionality to
@@ -2153,7 +2152,8 @@ config ARCH_SUSPEND_POSSIBLE
 	def_bool y

 config ARM_CPU_SUSPEND
-	def_bool PM_SLEEP
+	def_bool PM_SLEEP || BL_SWITCHER
+	depends on ARCH_SUSPEND_POSSIBLE

 config ARCH_HIBERNATION_POSSIBLE
 	bool
-- 
2.19.1