diff options
| author | Mark Rutland <mark.rutland@arm.com> | 2013-10-24 19:30:17 (GMT) |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-10-25 10:33:20 (GMT) |
| commit | e8765b265a69c83504afc6901d6e137b1811d1f0 (patch) | |
| tree | 906c836879d4994ca6abd5e87a5f175d81020697 /arch/arm64/kernel/smp.c | |
| parent | 652af899799354049b273af897b798b8f03fdd88 (diff) | |
| download | linux-e8765b265a69c83504afc6901d6e137b1811d1f0.tar.xz | |
arm64: read enable-method for CPU0
With the advent of CPU_HOTPLUG, the enable-method property for CPU0 may
tells us something useful (i.e. how to hotplug it back on), so we must
read it along with all the enable-method for all the other CPUs. Even
on UP the enable-method may tell us useful information (e.g. if a core
has some mechanism that might be usable for cpuidle), so we should
always read it.
This patch factors out the reading of the enable method, and ensures
that CPU0's enable method is read regardless of whether the kernel is
built with SMP support.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel/smp.c')
| -rw-r--r-- | arch/arm64/kernel/smp.c | 18 |
1 files changed, 1 insertions, 17 deletions
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 6806bc4..e992734 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -185,7 +185,6 @@ static void (*smp_cross_call)(const struct cpumask *, unsigned int); */ void __init smp_init_cpus(void) { - const char *enable_method; struct device_node *dn = NULL; unsigned int i, cpu = 1; bool bootcpu_valid = false; @@ -256,23 +255,8 @@ void __init smp_init_cpus(void) if (cpu >= NR_CPUS) goto next; - /* - * We currently support only the "spin-table" enable-method. - */ - enable_method = of_get_property(dn, "enable-method", NULL); - if (!enable_method) { - pr_err("%s: missing enable-method property\n", - dn->full_name); + if (cpu_read_ops(dn, cpu) != 0) goto next; - } - - cpu_ops[cpu] = cpu_get_ops(enable_method); - - if (!cpu_ops[cpu]) { - pr_err("%s: invalid enable-method property: %s\n", - dn->full_name, enable_method); - goto next; - } if (cpu_ops[cpu]->cpu_init(dn, cpu)) goto next; |