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x86-64: Use absolute displacements for per-cpu accesses.

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Accessing memory through %gs should not use rip-relative addressing.
Adding a P prefix for the argument tells gcc to not add (%rip) to
the memory references.

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 00:38:59 +09:00
committed by Tejun Heo
parent c2558e0eba
commit 87b2640658
2 changed files with 14 additions and 14 deletions
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2
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 "__percpu_seg_str"%P[current_task],%%rsi\n\t" \
"movq "__percpu_arg([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" \