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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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24
arch/x86/include/asm/current.h
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@ -1,39 +1,21 @@
#ifndef _ASM_X86_CURRENT_H
#define _ASM_X86_CURRENT_H
#ifdef CONFIG_X86_32
#include <linux/compiler.h>
#include <asm/percpu.h>
#ifndef __ASSEMBLY__
struct task_struct;
DECLARE_PER_CPU(struct task_struct *, current_task);
static __always_inline struct task_struct *get_current(void)
{
return percpu_read(current_task);
}
#else /* X86_32 */
#ifndef __ASSEMBLY__
#include <asm/pda.h>
struct task_struct;
static __always_inline struct task_struct *get_current(void)
{
return read_pda(pcurrent);
}
#else /* __ASSEMBLY__ */
#include <asm/asm-offsets.h>
#define GET_CURRENT(reg) movq %gs:(pda_pcurrent),reg
#define current get_current()
#endif /* __ASSEMBLY__ */
#endif /* X86_32 */
#define current get_current()
#endif /* _ASM_X86_CURRENT_H */