In order to identify the boot cpu, its intserv[] should be recorded and
checked in smp_setup_cpu_maps().

smp_setup_cpu_maps() is shared between PPC64 and PPC32. Since PPC64 has
already used boot_cpu_hwid to carry that information, enabling this
variable on PPC32 so later it can also be used to carry that information
for PPC32 in the coming patch.

Signed-off-by: Pingfan Liu <redacted>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Christophe Leroy <redacted>
Cc: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Cc: Wen Xiong <redacted>
Cc: Baoquan He <bhe@redhat.com>
Cc: Ming Lei <redacted>
Cc: kexec@lists.infradead.org
To: linuxppc-dev@lists.ozlabs.org
Reported-by: kernel test robot <redacted>
Closes: https://lore.kernel.org/oe-kbuild-all/202309130232.N2REwHBv-lkp@intel.com/ (local)
---
 arch/powerpc/include/asm/smp.h     | 2 +-
 arch/powerpc/kernel/prom.c         | 3 +--
 arch/powerpc/kernel/setup-common.c | 2 --
 3 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/include/asm/smp.h b/arch/powerpc/include/asm/smp.h
index aaaa576d0e15..5db9178cc800 100644
--- a/arch/powerpc/include/asm/smp.h
+++ b/arch/powerpc/include/asm/smp.h

@@ -26,7 +26,7 @@
 #include <asm/percpu.h>
 
 extern int boot_cpuid;
-extern int boot_cpu_hwid; /* PPC64 only */
+extern int boot_cpu_hwid;
 extern int spinning_secondaries;
 extern u32 *cpu_to_phys_id;
 extern bool coregroup_enabled;

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 0b5878c3125b..ec82f5bda908 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c

@@ -372,8 +372,7 @@ static int __init early_init_dt_scan_cpus(unsigned long node,
 	    be32_to_cpu(intserv[found_thread]));
 	boot_cpuid = found;
 
-	if (IS_ENABLED(CONFIG_PPC64))
-		boot_cpu_hwid = be32_to_cpu(intserv[found_thread]);
+	boot_cpu_hwid = be32_to_cpu(intserv[found_thread]);
 
 	/*
 	 * PAPR defines "logical" PVR values for cpus that

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index d2a446216444..1b19a9815672 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c

@@ -87,9 +87,7 @@ EXPORT_SYMBOL(machine_id);
 int boot_cpuid = -1;
 EXPORT_SYMBOL_GPL(boot_cpuid);
 
-#ifdef CONFIG_PPC64
 int boot_cpu_hwid = -1;
-#endif
 
 /*
  * These are used in binfmt_elf.c to put aux entries on the stack

-- 
2.31.1