Replace open coded parsing of CPU nodes' 'reg' property with
of_get_cpu_hwid().

Cc: Michael Ellerman <m...@ellerman.id.au>
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Cc: Paul Mackerras <pau...@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Rob Herring <r...@kernel.org>
---
 arch/powerpc/kernel/smp.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 9cc7d3dbf439..d96b0e361a73 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -1313,18 +1313,13 @@ int __cpu_up(unsigned int cpu, struct task_struct 
*tidle)
 int cpu_to_core_id(int cpu)
 {
        struct device_node *np;
-       const __be32 *reg;
        int id = -1;
 
        np = of_get_cpu_node(cpu, NULL);
        if (!np)
                goto out;
 
-       reg = of_get_property(np, "reg", NULL);
-       if (!reg)
-               goto out;
-
-       id = be32_to_cpup(reg);
+       id = of_get_cpu_hwid(np, 0);
 out:
        of_node_put(np);
        return id;
-- 
2.30.2

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