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| 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 /arch/i386/mach-voyager/voyager_smp.c | |
| parent | ae1ee11be77f51cedb6c569887dddc70c163ab6d (diff) | |
| download | lwn-bf50467204b435421d8de33ad080fa46c6f3d50b.tar.gz lwn-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 'arch/i386/mach-voyager/voyager_smp.c')
| -rw-r--r-- | arch/i386/mach-voyager/voyager_smp.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/arch/i386/mach-voyager/voyager_smp.c b/arch/i386/mach-voyager/voyager_smp.c index 15d8132d4f5e..b9ce33c0c202 100644 --- a/arch/i386/mach-voyager/voyager_smp.c +++ b/arch/i386/mach-voyager/voyager_smp.c @@ -765,12 +765,6 @@ initialize_secondary(void) #endif /* - * switch to the per CPU GDT we already set up - * in do_boot_cpu() - */ - cpu_set_gdt(current_thread_info()->cpu); - - /* * We don't actually need to load the full TSS, * basically just the stack pointer and the eip. */ |