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of: Make cpu node handling more portable.

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Use for_each_node_by_type() to iterate all cpu nodes in the
system.

Provide and overridable function arch_find_n_match_cpu_physical_id,
which sees if the given device node matches 'cpu' and if so sets
'*thread' when non-NULL to the cpu thread number within the core.

The default implementation behaves the same as the existing code.

Add a sparc64 implementation.

Signed-off-by: David S. Miller <davem@davemloft.net>
Tested-by: Sudeep KarkadaNagesha <Sudeep.KarkadaNagesha@arm.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
This commit is contained in:
David Miller 2013-10-03 17:24:51 -04:00 • committed by Grant Likely
parent 444c91e572
commit d1cb9d1af0
3 changed files with 84 additions and 17 deletions
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3
include/linux/cpu.h
View file

@ -18,6 +18,7 @@
#include <linux/cpumask.h>
struct device;
struct device_node;
struct cpu {
int node_id; /* The node which contains the CPU */
@ -29,6 +30,8 @@ extern int register_cpu(struct cpu *cpu, int num);
extern struct device *get_cpu_device(unsigned cpu);
extern bool cpu_is_hotpluggable(unsigned cpu);
extern bool arch_match_cpu_phys_id(int cpu, u64 phys_id);
extern bool arch_find_n_match_cpu_physical_id(struct device_node *cpun,
int cpu, unsigned int *thread);
extern int cpu_add_dev_attr(struct device_attribute *attr);
extern void cpu_remove_dev_attr(struct device_attribute *attr);