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Commit b92ad209 authored by Leela Krishna Amudala's avatar Leela Krishna Amudala Committed by Kukjin Kim
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ARM: EXYNOS: Use wfi macro in platform_do_lowpower 



This patch is originally based on commit b3377d18 ("ARM: 7064/1:
vexpress: Use wfi macro in platform_do_lowpower.")

Current Exynos CPU hotplug code includes a hardcoded WFI instruction,
in ARM encoding. When the kernel is compiled in Thumb-2 mode, this
is invalid and causes the machine to hang hard when a CPU is offlined.

Use wfi macro instead of the hardcoded WFI instruction.

Signed-off-by: default avatarLeela Krishna Amudala <leela.krishna@linaro.org>
Acked-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent 7171511e

arch/arm/mach-exynos/hotplug.c

+1 −7
Original line number Diff line number Diff line
@@ -46,13 +46,7 @@ static inline void platform_do_lowpower(unsigned int cpu, int *spurious) 
		if (cpu == 1)

			exynos_cpu_power_down(cpu);



		/*

		 * here's the WFI

		 */

		asm(".word	0xe320f003\n"

		    :

		    :

		    : "memory", "cc");

		wfi();



		if (pen_release == cpu_logical_map(cpu)) {

			/*