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ARM: EXYNOS: Use wfi macro in platform_do_lowpower

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This patch is originally based on commit b3377d1865 ("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: Leela Krishna Amudala <leela.krishna@linaro.org>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Leela Krishna Amudala 2014-05-28 00:43:21 +09:00 committed by Kukjin Kim
parent 7171511eae
commit b92ad209c2
1 changed files with 1 additions and 7 deletions
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8
arch/arm/mach-exynos/hotplug.c
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@ -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)) {
/*