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| author |   Brian Gerst <brgerst@gmail.com> | 2009-01-19 00:38:58 +0900 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2009-01-19 00:38:58 +0900 |
| commit | c6f5e0acd5d12ee23f701f15889872e67b47caa6 (patch) | |
| tree | a4613618f06d7519f954745b893b4f572ecd39d9 /arch/x86/kernel/process_64.c | |
| parent | x86-64: Move cpu number from PDA to per-cpu and consolidate with 32-bit. (diff) | |
| download | linux-dev-c6f5e0acd5d12ee23f701f15889872e67b47caa6.tar.xz linux-dev-c6f5e0acd5d12ee23f701f15889872e67b47caa6.zip | |
x86-64: Move current task from PDA to per-cpu and consolidate with 32-bit.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'arch/x86/kernel/process_64.c')
| -rw-r--r-- | arch/x86/kernel/process_64.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 416fb9282f4f..e00c31a4b3c0 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -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) + |