[PATCH 03/20] x86: apic: hide unused safe_smp_processor_id on UP

[Arnd Bergmann <arnd@xxxxxxxxxx>]

From: Arnd Bergmann <arnd@xxxxxxxx>

When CONFIG_SMP is disabled, the prototype for safe_smp_processor_id()
is hidden, which causes a W=1 warning:

/home/arnd/arm-soc/arch/x86/kernel/apic/ipi.c:316:5: error: no previous 
prototype for 'safe_smp_processor_id' [-Werror=missing-prototypes]

Since there are no callers in this configuration, just hide the definition
as well.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
 arch/x86/kernel/apic/ipi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/apic/ipi.c b/arch/x86/kernel/apic/ipi.c
index 2a6509e8c840..9bfd6e397384 100644
--- a/arch/x86/kernel/apic/ipi.c
+++ b/arch/x86/kernel/apic/ipi.c
@@ -301,6 +301,7 @@ void default_send_IPI_mask_logical(const struct cpumask 
*cpumask, int vector)
        local_irq_restore(flags);
 }
 
+#ifdef CONFIG_SMP
 /* must come after the send_IPI functions above for inlining */
 static int convert_apicid_to_cpu(int apic_id)
 {
@@ -329,3 +330,4 @@ int safe_smp_processor_id(void)
        return cpuid >= 0 ? cpuid : 0;
 }
 #endif
+#endif
-- 
2.39.2