powerpc: Use of_get_cpu_hwid()

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

Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211006164332.1981454-8-robh@kernel.org

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 9cc7d3dbf4392f2b842eb96df38d7918bcc99768..d96b0e361a73558c5e02413eb1fa8a6adf2be3a7 100644 (file)
--- 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;