[patch 22/53] x86/apic: Use a proper define for invalid ACPI CPU ID

Thomas Gleixner
2023-08-07T13:54:13Z

The ACPI ID for CPUs is preset with U32_MAX which is completely non
obvious. Use a proper define for it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/include/asm/apic.h | 2 ++
arch/x86/kernel/apic/apic.c | 2 +-
arch/x86/xen/enlighten_hvm.c | 2 +-
3 files changed, 4 insertions(+), 2 deletions(-)

--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -46,6 +46,8 @@ extern void x86_32_probe_apic(void);
static inline void x86_32_probe_apic(void) { }
#endif

+#define CPU_ACPIID_INVALID U32_MAX
+
#ifdef CONFIG_X86_LOCAL_APIC

extern int apic_verbosity;
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -111,7 +111,7 @@ static inline bool apic_accessible(void)
* Map cpu index to physical APIC ID
*/
DEFINE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid, BAD_APICID);
-DEFINE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid, U32_MAX);
+DEFINE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid, CPU_ACPIID_INVALID);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_apicid);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_acpiid);

--- a/arch/x86/xen/enlighten_hvm.c
+++ b/arch/x86/xen/enlighten_hvm.c
@@ -168,7 +168,7 @@ static int xen_cpu_up_prepare_hvm(unsign
*/
xen_uninit_lock_cpu(cpu);

- if (cpu_acpi_id(cpu) != U32_MAX)
+ if (cpu_acpi_id(cpu) != CPU_ACPIID_INVALID)
per_cpu(xen_vcpu_id, cpu) = cpu_acpi_id(cpu);
else
per_cpu(xen_vcpu_id, cpu) = cpu;