ARM and ARM64 are the only two architectures implementing arch_cpu_idle_prepare() simply to call local_fiq_enable().
We have secondary_start_kernel() already calling local_fiq_enable() and this is done a second time in arch_cpu_idle_prepare() in that case. And enabling FIQs has nothing to do with idling the CPU to start with.
So let's introduce init_fiq_boot_cpu() to take care of FIQs on the boot CPU and remove arch_cpu_idle_prepare(). This is now done a bit earlier at late_initcall time but this shouldn't make a difference in practice given that FIQs are not currently used on ARM64.
Signed-off-by: Nicolas Pitre nico@linaro.org --- arch/arm64/kernel/process.c | 5 ----- arch/arm64/kernel/setup.c | 7 +++++++ 2 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index de17c89985..f6c733da67 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -84,11 +84,6 @@ EXPORT_SYMBOL_GPL(pm_power_off); void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); EXPORT_SYMBOL_GPL(arm_pm_restart);
-void arch_cpu_idle_prepare(void) -{ - local_fiq_enable(); -} - /* * This is our default idle handler. */ diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index bd9bbd0e44..259557983a 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -255,6 +255,13 @@ static int __init arm64_device_init(void) } arch_initcall(arm64_device_init);
+static int __init init_fiq_boot_cpu(void) +{ + local_fiq_enable(); + return 0; +} +late_initcall(init_fiq_boot_cpu); + static DEFINE_PER_CPU(struct cpu, cpu_data);
static int __init topology_init(void)