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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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3b16cf8748
This converts x86, x86-64, and xen to use the new helpers for smp_call_function() and friends, and adds support for smp_call_function_single(). Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
27 lines
709 B
C
27 lines
709 B
C
/*
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* SMP stuff which is common to all sub-architectures.
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*/
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#include <linux/module.h>
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#include <asm/smp.h>
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#ifdef CONFIG_X86_32
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DEFINE_PER_CPU(unsigned long, this_cpu_off);
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EXPORT_PER_CPU_SYMBOL(this_cpu_off);
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/* Initialize the CPU's GDT. This is either the boot CPU doing itself
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(still using the master per-cpu area), or a CPU doing it for a
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secondary which will soon come up. */
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__cpuinit void init_gdt(int cpu)
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{
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struct desc_struct *gdt = get_cpu_gdt_table(cpu);
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pack_descriptor(&gdt[GDT_ENTRY_PERCPU],
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__per_cpu_offset[cpu], 0xFFFFF,
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0x2 | DESCTYPE_S, 0x8);
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gdt[GDT_ENTRY_PERCPU].s = 1;
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per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
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per_cpu(cpu_number, cpu) = cpu;
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}
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#endif
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