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| author | Brian Gerst <brgerst@gmail.com> | 2009-01-27 04:56:48 +0100 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2009-01-27 04:56:48 +0100 |
| commit | b2d2f4312b117a6cc647c8521e2643a88771f757 (patch) | |
| tree | cf512c6ed0cfc5081f095cfa1da974b1566bb043 /arch/x86/kernel/setup_percpu.c | |
| parent | x86: make Voyager use x86 per-cpu setup. (diff) | |
| download | linux-b2d2f4312b117a6cc647c8521e2643a88771f757.tar.xz linux-b2d2f4312b117a6cc647c8521e2643a88771f757.zip | |
x86: initialize per-cpu GDT segment in per-cpu setup
Impact: cleanup
Rename init_gdt() to setup_percpu_segment(), and move it to
setup_percpu.c.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'arch/x86/kernel/setup_percpu.c')
| -rw-r--r-- | arch/x86/kernel/setup_percpu.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c index 599dc1cc1da8..bcca3a7b3748 100644 --- a/arch/x86/kernel/setup_percpu.c +++ b/arch/x86/kernel/setup_percpu.c @@ -40,6 +40,19 @@ unsigned long __per_cpu_offset[NR_CPUS] __read_mostly = { }; EXPORT_SYMBOL(__per_cpu_offset); +static inline void setup_percpu_segment(int cpu) +{ +#ifdef CONFIG_X86_32 + struct desc_struct gdt; + + pack_descriptor(&gdt, per_cpu_offset(cpu), 0xFFFFF, + 0x2 | DESCTYPE_S, 0x8); + gdt.s = 1; + write_gdt_entry(get_cpu_gdt_table(cpu), + GDT_ENTRY_PERCPU, &gdt, DESCTYPE_S); +#endif +} + /* * Great future plan: * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data. @@ -81,6 +94,7 @@ void __init setup_per_cpu_areas(void) per_cpu_offset(cpu) = ptr - __per_cpu_start; per_cpu(this_cpu_off, cpu) = per_cpu_offset(cpu); per_cpu(cpu_number, cpu) = cpu; + setup_percpu_segment(cpu); /* * Copy data used in early init routines from the initial arrays to the * per cpu data areas. These arrays then become expendable and the |