The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 3100423dc133c25679dbaa1099404651b8ae3af9 Mon Sep 17 00:00:00 2001

From: Ahmad Fatoum a.fatoum@pengutronix.de Date: Mon, 23 Mar 2020 09:19:33 +0100 Subject: [PATCH] ARM: imx: provide v7_cpu_resume() only on ARM_CPU_SUSPEND=y

512a928affd5 ("ARM: imx: build v7_cpu_resume() unconditionally") introduced an unintended linker error for i.MX6 configurations that have ARM_CPU_SUSPEND=n which can happen if neither CONFIG_PM, CONFIG_CPU_IDLE, nor ARM_PSCI_FW are selected.

Fix this by having v7_cpu_resume() compiled only when cpu_resume() it calls is available as well.

The C declaration for the function remains unguarded to avoid future code inadvertently using a stub and introducing a regression to the bug the original commit fixed.

Cc: stable@vger.kernel.org Fixes: 512a928affd5 ("ARM: imx: build v7_cpu_resume() unconditionally") Reported-by: Clemens Gruber clemens.gruber@pqgruber.com Signed-off-by: Ahmad Fatoum a.fatoum@pengutronix.de Signed-off-by: Shawn Guo shawnguo@kernel.org

diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index 03506ce46149..e7364e6c8c6b 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -91,8 +91,10 @@ AFLAGS_suspend-imx6.o :=-Wa,-march=armv7-a obj-$(CONFIG_SOC_IMX6) += suspend-imx6.o obj-$(CONFIG_SOC_IMX53) += suspend-imx53.o endif +ifeq ($(CONFIG_ARM_CPU_SUSPEND),y) AFLAGS_resume-imx6.o :=-Wa,-march=armv7-a obj-$(CONFIG_SOC_IMX6) += resume-imx6.o +endif obj-$(CONFIG_SOC_IMX6) += pm-imx6.o

obj-$(CONFIG_SOC_IMX1) += mach-imx1.o