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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
commit c6f5e0acd5
9 changed files with 15 additions and 36 deletions
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4
arch/x86/include/asm/system.h
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@ -94,7 +94,7 @@ do { \
"call __switch_to\n\t" \
".globl thread_return\n" \
"thread_return:\n\t" \
"movq %%gs:%P[pda_pcurrent],%%rsi\n\t" \
"movq "__percpu_seg_str"%P[current_task],%%rsi\n\t" \
"movq %P[thread_info](%%rsi),%%r8\n\t" \
LOCK_PREFIX "btr %[tif_fork],%P[ti_flags](%%r8)\n\t" \
"movq %%rax,%%rdi\n\t" \
@ -106,7 +106,7 @@ do { \
[ti_flags] "i" (offsetof(struct thread_info, flags)), \
[tif_fork] "i" (TIF_FORK), \
[thread_info] "i" (offsetof(struct task_struct, stack)), \
[pda_pcurrent] "i" (offsetof(struct x8664_pda, pcurrent)) \
[current_task] "m" (per_cpu_var(current_task)) \
: "memory", "cc" __EXTRA_CLOBBER)
#endif