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x86-64: Move current task from PDA to per-cpu and consolidate with 32-bit.

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Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Brian Gerst
2009-01-19 00:38:58 +09:00
committed by Tejun Heo
parent ea9279066d
commit c6f5e0acd5
9 changed files with 15 additions and 36 deletions
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5
arch/x86/kernel/process_64.c
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@ -57,6 +57,9 @@
asmlinkage extern void ret_from_fork(void);
DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task;
EXPORT_PER_CPU_SYMBOL(current_task);
unsigned long kernel_thread_flags = CLONE_VM | CLONE_UNTRACED;
static ATOMIC_NOTIFIER_HEAD(idle_notifier);
@ -615,7 +618,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
*/
prev->usersp = read_pda(oldrsp);
write_pda(oldrsp, next->usersp);
write_pda(pcurrent, next_p);
percpu_write(current_task, next_p);
write_pda(kernelstack,
(unsigned long)task_stack_page(next_p) +