aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/mach-voyager
diff options
context:
space:
mode:
authorTejun Heo <tj@kernel.org>2009-01-13 20:41:35 +0900
committerIngo Molnar <mingo@elte.hu>2009-01-16 14:19:58 +0100
commit9939ddaff52787b2a7c1adf1b2afc95421aa0884 (patch)
tree6e7266d065914e19c3c3f4b4e475f09b9669fa51 /arch/x86/mach-voyager
parent1a51e3a0aed18767cf2762e95456ecfeb0bca5e6 (diff)
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/mach-voyager')
-rw-r--r--arch/x86/mach-voyager/voyager_smp.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/mach-voyager/voyager_smp.c b/arch/x86/mach-voyager/voyager_smp.c
index 9840b7ec749..1a48368acb0 100644
--- a/arch/x86/mach-voyager/voyager_smp.c
+++ b/arch/x86/mach-voyager/voyager_smp.c
@@ -531,6 +531,7 @@ static void __init do_boot_cpu(__u8 cpu)
stack_start.sp = (void *)idle->thread.sp;
init_gdt(cpu);
+ per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
per_cpu(current_task, cpu) = idle;
early_gdt_descr.address = (unsigned long)get_cpu_gdt_table(cpu);
irq_ctx_init(cpu);
@@ -1748,6 +1749,7 @@ static void __init voyager_smp_prepare_cpus(unsigned int max_cpus)
static void __cpuinit voyager_smp_prepare_boot_cpu(void)
{
init_gdt(smp_processor_id());
+ per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
switch_to_new_gdt();
cpu_set(smp_processor_id(), cpu_online_map);