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SubjectRe: [PATCH v2] Use devicetree to determine present cpus (v2)
Date
Signed-off-by: Jan Henrik Weinstock <jan.weinstock@rwth-aachen.de>
---
arch/openrisc/kernel/smp.c | 31 +++++++++++++++----------------
1 file changed, 15 insertions(+), 16 deletions(-)

diff --git a/arch/openrisc/kernel/smp.c b/arch/openrisc/kernel/smp.c
index 75be7e34f..83cbf43d4 100644
--- a/arch/openrisc/kernel/smp.c
+++ b/arch/openrisc/kernel/smp.c
@@ -61,32 +61,31 @@ void __init smp_prepare_boot_cpu(void)

void __init smp_init_cpus(void)
{
- int i;
+ struct device_node* cpu;
+ u32 cpu_id;
+
+ for_each_of_cpu_node(cpu) {
+ if (of_property_read_u32(cpu, "reg", &cpu_id)) {
+ pr_warn("%s missing reg property", cpu->full_name);
+ continue;
+ }

- for (i = 0; i < NR_CPUS; i++)
- set_cpu_possible(i, true);
+ if (cpu_id < NR_CPUS)
+ set_cpu_possible(cpu_id, true);
+ }
}

void __init smp_prepare_cpus(unsigned int max_cpus)
{
- u32 cpu_id;
- struct device_node *cpu, *cpus;
+ unsigned int cpu;

/*
* Initialise the present map, which describes the set of CPUs
* actually populated at the present time.
*/
- cpus = of_find_node_by_path("/cpus");
- for_each_child_of_node(cpus, cpu) {
- if (of_property_read_u32(cpu, "reg", &cpu_id)) {
- pr_warn("%s missing reg property", cpu->full_name);
- continue;
- }
-
- if (cpu_id >= max_cpus)
- continue;
-
- set_cpu_present(cpu_id, true);
+ for_each_possible_cpu(cpu) {
+ if (cpu < max_cpus)
+ set_cpu_present(cpu, true);
}
}

--
2.17.1
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