4.4-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 6c044fecdf78be3fda159a5036bb33700cdd5e59 ]
It is not possible to build the bL_switcher code if the GIC driver is disabled, because it relies on calling into some gic specific interfaces, and that would result in this build error:
arch/arm/common/built-in.o: In function `bL_switch_to': :(.text+0x1230): undefined reference to `gic_get_sgir_physaddr' :(.text+0x1244): undefined reference to `gic_send_sgi' :(.text+0x1268): undefined reference to `gic_migrate_target' arch/arm/common/built-in.o: In function `bL_switcher_enable.part.4': :(.text.unlikely+0x2f8): undefined reference to `gic_get_cpu_id'
This adds a Kconfig dependency to ensure we only build the big-little switcher if the GIC driver is present as well.
Almost all ARMv7 platforms come with a GIC anyway, but it is possible to build a kernel that disables all platforms.
Signed-off-by: Arnd Bergmann arnd@arndb.de Acked-by: Nicolas Pitre nico@linaro.org Signed-off-by: Russell King rmk+kernel@arm.linux.org.uk Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 3a0277c6c060..4cc908ee107f 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1422,7 +1422,7 @@ config BIG_LITTLE
config BL_SWITCHER bool "big.LITTLE switcher support" - depends on BIG_LITTLE && MCPM && HOTPLUG_CPU + depends on BIG_LITTLE && MCPM && HOTPLUG_CPU && ARM_GIC select ARM_CPU_SUSPEND select CPU_PM help