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| author | Thomas Gleixner <tglx@linutronix.de> | 2023-08-14 10:18:39 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2023-10-10 14:38:18 +0200 |
| commit | 9ff4275bc8fd7bd5ac4677e2724397f8db3209bf (patch) | |
| tree | 20cb865f2d171207cddb9871762288ba37bb49dc /arch/x86/kernel/apic/apic.c | |
| parent | 6e29032340b60f7aa7475c8234b17273e4424007 (diff) | |
| download | lwn-9ff4275bc8fd7bd5ac4677e2724397f8db3209bf.tar.gz lwn-9ff4275bc8fd7bd5ac4677e2724397f8db3209bf.zip | |
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 <tglx@linutronix.de>
Tested-by: Juergen Gross <jgross@suse.com>
Tested-by: Sohil Mehta <sohil.mehta@intel.com>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230814085112.862835121@linutronix.de
Diffstat (limited to 'arch/x86/kernel/apic/apic.c')
| -rw-r--r-- | arch/x86/kernel/apic/apic.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 3cdf48493546..d2b1d60c752a 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) { |