diff options
Diffstat (limited to 'arch/i386/kernel/cpu/common.c')
| -rw-r--r-- | arch/i386/kernel/cpu/common.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c index 27e00565f5e4..794d593c47eb 100644 --- a/arch/i386/kernel/cpu/common.c +++ b/arch/i386/kernel/cpu/common.c @@ -638,6 +638,18 @@ struct pt_regs * __devinit idle_regs(struct pt_regs *regs) return regs; } +/* Current gdt points %fs at the "master" per-cpu area: after this, + * it's on the real one. */ +void switch_to_new_gdt(void) +{ + struct Xgt_desc_struct gdt_descr; + + gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id()); + gdt_descr.size = GDT_SIZE - 1; + load_gdt(&gdt_descr); + asm("mov %0, %%fs" : : "r" (__KERNEL_PERCPU) : "memory"); +} + /* * cpu_init() initializes state that is per-CPU. Some data is already * initialized (naturally) in the bootstrap process, such as the GDT @@ -668,6 +680,7 @@ void __cpuinit cpu_init(void) } load_idt(&idt_descr); + switch_to_new_gdt(); /* * Set up and load the per-CPU TSS and LDT |