From 9ff4275bc8fd7bd5ac4677e2724397f8db3209bf Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 14 Aug 2023 10:18:39 +0200 Subject: [PATCH] x86/apic: Use BAD_APICID consistently APIC ID checks compare with BAD_APICID all over the place, but some initializers and some code which fiddles with global data structure use -1[U] instead. That simply cannot work at all. Fix it up and use BAD_APICID consistently all over the place. Signed-off-by: Thomas Gleixner Tested-by: Juergen Gross Tested-by: Sohil Mehta Tested-by: Michael Kelley Tested-by: Peter Zijlstra (Intel) Tested-by: Zhang Rui Acked-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20230814085112.862835121@linutronix.de --- arch/x86/kernel/acpi/boot.c | 2 +- arch/x86/kernel/apic/apic.c | 6 ++---- 2 files changed, 3 insertions(+), 5 deletions(-) diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 2a0ea38955dff0..f3e4d35bb20e88 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -856,7 +856,7 @@ int acpi_unmap_cpu(int cpu) set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); #endif - per_cpu(x86_cpu_to_apicid, cpu) = -1; + per_cpu(x86_cpu_to_apicid, cpu) = BAD_APICID; set_cpu_present(cpu, false); num_processors--; diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 3cdf48493546dd..d2b1d60c752aea 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -72,7 +72,7 @@ unsigned int num_processors; unsigned disabled_cpus; /* Processor that is doing the boot up */ -unsigned int boot_cpu_physical_apicid __ro_after_init = -1U; +unsigned int boot_cpu_physical_apicid __ro_after_init = BAD_APICID; EXPORT_SYMBOL_GPL(boot_cpu_physical_apicid); u8 boot_cpu_apic_version __ro_after_init; @@ -2318,9 +2318,7 @@ static int nr_logical_cpuids = 1; /* * Used to store mapping between logical CPU IDs and APIC IDs. */ -int cpuid_to_apicid[] = { - [0 ... NR_CPUS - 1] = -1, -}; +int cpuid_to_apicid[] = { [0 ... NR_CPUS - 1] = BAD_APICID, }; bool arch_match_cpu_phys_id(int cpu, u64 phys_id) {