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| author | Tejun Heo <tj@kernel.org> | 2009-01-13 12:41:35 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-16 14:19:58 +0100 |
| commit | 9939ddaff52787b2a7c1adf1b2afc95421aa0884 (patch) | |
| tree | 6e7266d065914e19c3c3f4b4e475f09b9669fa51 /arch/x86/kernel/asm-offsets_64.c | |
| parent | x86: fold pda into percpu area on SMP (diff) | |
| download | linux-9939ddaff52787b2a7c1adf1b2afc95421aa0884.tar.xz linux-9939ddaff52787b2a7c1adf1b2afc95421aa0884.zip | |
x86: merge 64 and 32 SMP percpu handling
Now that pda is allocated as part of percpu, percpu doesn't need to be
accessed through pda. Unify x86_64 SMP percpu access with x86_32 SMP
one. Other than the segment register, operand size and the base of
percpu symbols, they behave identical now.
This patch replaces now unnecessary pda->data_offset with a dummy
field which is necessary to keep stack_canary at its place. This
patch also moves per_cpu_offset initialization out of init_gdt() into
setup_per_cpu_areas(). Note that this change also necessitates
explicit per_cpu_offset initializations in voyager_smp.c.
With this change, x86_OP_percpu()'s are as efficient on x86_64 as on
x86_32 and also x86_64 can use assembly PER_CPU macros.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/asm-offsets_64.c')
| -rw-r--r-- | arch/x86/kernel/asm-offsets_64.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/kernel/asm-offsets_64.c b/arch/x86/kernel/asm-offsets_64.c index f8d1b047ef4f..f4cc81bfbf89 100644 --- a/arch/x86/kernel/asm-offsets_64.c +++ b/arch/x86/kernel/asm-offsets_64.c @@ -55,7 +55,6 @@ int main(void) ENTRY(irqcount); ENTRY(cpunumber); ENTRY(irqstackptr); - ENTRY(data_offset); DEFINE(pda_size, sizeof(struct x8664_pda)); BLANK(); #undef ENTRY |