[patch V3 19/44] x86/ipi: Make platform IPI depend on APIC

[Thomas Gleixner]

The platform IPI vector is only installed when the local APIC is enabled. All
users of it depend on the local APIC anyway.

Make the related code conditional on CONFIG_X86_LOCAL_APIC.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 arch/x86/include/asm/entry_arch.h |    3 +--
 arch/x86/kernel/irq.c             |   11 ++++++-----
 2 files changed, 7 insertions(+), 7 deletions(-)

--- a/arch/x86/include/asm/entry_arch.h
+++ b/arch/x86/include/asm/entry_arch.h
@@ -17,8 +17,6 @@ BUILD_INTERRUPT(irq_move_cleanup_interru
 BUILD_INTERRUPT(reboot_interrupt, REBOOT_VECTOR)
 #endif
 
-BUILD_INTERRUPT(x86_platform_ipi, X86_PLATFORM_IPI_VECTOR)
-
 #ifdef CONFIG_HAVE_KVM
 BUILD_INTERRUPT(kvm_posted_intr_ipi, POSTED_INTR_VECTOR)
 BUILD_INTERRUPT(kvm_posted_intr_wakeup_ipi, POSTED_INTR_WAKEUP_VECTOR)
@@ -37,6 +35,7 @@ BUILD_INTERRUPT(kvm_posted_intr_nested_i
 BUILD_INTERRUPT(apic_timer_interrupt,LOCAL_TIMER_VECTOR)
 BUILD_INTERRUPT(error_interrupt,ERROR_APIC_VECTOR)
 BUILD_INTERRUPT(spurious_interrupt,SPURIOUS_APIC_VECTOR)
+BUILD_INTERRUPT(x86_platform_ipi, X86_PLATFORM_IPI_VECTOR)
 
 #ifdef CONFIG_IRQ_WORK
 BUILD_INTERRUPT(irq_work_interrupt, IRQ_WORK_VECTOR)
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -29,9 +29,6 @@ EXPORT_PER_CPU_SYMBOL(irq_regs);
 
 atomic_t irq_err_count;
 
-/* Function pointer for generic interrupt vector handling */
-void (*x86_platform_ipi_callback)(void) = NULL;
-
 /*
  * 'what should we do if we get a hw irq event on an illegal vector'.
  * each architecture has to answer this themselves.
@@ -87,13 +84,13 @@ int arch_show_interrupts(struct seq_file
 	for_each_online_cpu(j)
 		seq_printf(p, "%10u ", irq_stats(j)->icr_read_retry_count);
 	seq_puts(p, "  APIC ICR read retries\n");
-#endif
 	if (x86_platform_ipi_callback) {
 		seq_printf(p, "%*s: ", prec, "PLT");
 		for_each_online_cpu(j)
 			seq_printf(p, "%10u ", irq_stats(j)->x86_platform_ipis);
 		seq_puts(p, "  Platform interrupts\n");
 	}
+#endif
 #ifdef CONFIG_SMP
 	seq_printf(p, "%*s: ", prec, "RES");
 	for_each_online_cpu(j)
@@ -183,9 +180,9 @@ u64 arch_irq_stat_cpu(unsigned int cpu)
 	sum += irq_stats(cpu)->apic_perf_irqs;
 	sum += irq_stats(cpu)->apic_irq_work_irqs;
 	sum += irq_stats(cpu)->icr_read_retry_count;
-#endif
 	if (x86_platform_ipi_callback)
 		sum += irq_stats(cpu)->x86_platform_ipis;
+#endif
 #ifdef CONFIG_SMP
 	sum += irq_stats(cpu)->irq_resched_count;
 	sum += irq_stats(cpu)->irq_call_count;
@@ -259,6 +256,9 @@ u64 arch_irq_stat(void)
 	return 1;
 }
 
+#ifdef CONFIG_X86_LOCAL_APIC
+/* Function pointer for generic interrupt vector handling */
+void (*x86_platform_ipi_callback)(void) = NULL;
 /*
  * Handler for X86_PLATFORM_IPI_VECTOR.
  */
@@ -275,6 +275,7 @@ u64 arch_irq_stat(void)
 	exiting_irq();
 	set_irq_regs(old_regs);
 }
+#endif
 
 #ifdef CONFIG_HAVE_KVM
 static void dummy_handler(void) {}