diff options
| author |   Rusty Russell <rusty@rustcorp.com.au> | 2007-05-02 19:27:10 +0200 |
|---|---|---|
| committer |   Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:10 +0200 |
| commit | bf50467204b435421d8de33ad080fa46c6f3d50b (patch) | |
| tree | 87a27c6f23f28d0e7dacee4ac45986e897d244a8 /include | |
| parent | [PATCH] i386: Use per-cpu variables for GDT, PDA (diff) | |
| download | linux-dev-bf50467204b435421d8de33ad080fa46c6f3d50b.tar.xz linux-dev-bf50467204b435421d8de33ad080fa46c6f3d50b.zip | |
[PATCH] i386: Use per-cpu GDT immediately upon boot
Now we are no longer dynamically allocating the GDT, we don't need the
"cpu_gdt_table" at all: we can switch straight from "boot_gdt_table" to the
per-cpu GDT. This means initializing the cpu_gdt array in C.
The boot CPU uses the per-cpu var directly, then in smp_prepare_cpus() it
switches to the per-cpu copy just allocated. For secondary CPUs, the
early_gdt_descr is set to point directly to their per-cpu copy.
For UP the code is very simple: it keeps using the "per-cpu" GDT as per SMP,
but we never have to move.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-i386/desc.h | 2 | ||||
| -rw-r--r-- | include/asm-i386/processor.h | 1 |
2 files changed, 0 insertions, 3 deletions
diff --git a/include/asm-i386/desc.h b/include/asm-i386/desc.h index 53c5916687b6..a75ae6b97860 100644 --- a/include/asm-i386/desc.h +++ b/include/asm-i386/desc.h @@ -12,8 +12,6 @@ #include <asm/mmu.h> -extern struct desc_struct cpu_gdt_table[GDT_ENTRIES]; - struct Xgt_desc_struct { unsigned short size; unsigned long address __attribute__((packed)); diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h index cd940befef53..b25a2f5b5375 100644 --- a/include/asm-i386/processor.h +++ b/include/asm-i386/processor.h @@ -743,7 +743,6 @@ extern unsigned long boot_option_idle_override; extern void enable_sep_cpu(void); extern int sysenter_setup(void); -extern void init_gdt(int cpu, struct task_struct *idle); extern void cpu_set_gdt(int); extern void secondary_cpu_init(void); |