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x86: don't assume boot cpu is #0

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Impact: minor cleanup

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Brian Gerst 2009-01-27 12:56:48 +09:00 committed by Tejun Heo
parent 1688401a0f
commit 34019be1cd
1 changed files with 5 additions and 4 deletions
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9
arch/x86/kernel/setup_percpu.c
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@ -15,6 +15,7 @@
#include <asm/highmem.h> #include <asm/highmem.h>
#include <asm/proto.h> #include <asm/proto.h>
#include <asm/cpumask.h> #include <asm/cpumask.h>
#include <asm/cpu.h>
#ifdef CONFIG_DEBUG_PER_CPU_MAPS #ifdef CONFIG_DEBUG_PER_CPU_MAPS
# define DBG(x...) printk(KERN_DEBUG x) # define DBG(x...) printk(KERN_DEBUG x)
@ -37,7 +38,7 @@ EXPORT_PER_CPU_SYMBOL(this_cpu_off);
#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA #ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly = { unsigned long __per_cpu_offset[NR_CPUS] __read_mostly = {
[0] = BOOT_PERCPU_OFFSET, [0 ... NR_CPUS-1] = BOOT_PERCPU_OFFSET,
}; };
EXPORT_SYMBOL(__per_cpu_offset); EXPORT_SYMBOL(__per_cpu_offset);
@ -101,10 +102,10 @@ void __init setup_per_cpu_areas(void)
early_per_cpu_map(x86_cpu_to_node_map, cpu); early_per_cpu_map(x86_cpu_to_node_map, cpu);
#endif #endif
/* /*
* Up to this point, CPU0 has been using .data.init * Up to this point, the boot CPU has been using .data.init
* area. Reload %gs offset for CPU0. * area. Reload %gs offset for the boot CPU.
*/ */
if (cpu == 0) if (cpu == boot_cpu_id)
load_gs_base(cpu); load_gs_base(cpu);
#endif #endif