On Mon, 2023-02-27 at 06:14 +0000, Usama Arif wrote: > > diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S > index 17bdd6122dca..5d709aa67df4 100644 > --- a/arch/x86/kernel/head_64.S > +++ b/arch/x86/kernel/head_64.S > @@ -273,7 +273,11 @@ SYM_INNER_LABEL(secondary_startup_64_no_verify, > SYM_L_GLOBAL) > cmpl (%rbx,%rcx,4), %edx > jz .Lsetup_cpu > inc %ecx > +#if (NR_CPUS == 1) || defined(CONFIG_FORCE_NR_CPUS) > + cmpl $NR_CPUS, %ecx > +#else > cmpl nr_cpu_ids(%rip), %ecx > +#endif > jb .Lfind_cpunr > > /* APIC ID not found in the table. Drop the trampoline lock > and bail. */ The whitespace looks dodgy there but maybe that's just your mail client? Given this code is already in #ifdef CONFIG_SMP, can NR_CPUS be 1?
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