current.h
#ifndef _X86_64_CURRENT_H
#define _X86_64_CURRENT_H
#if !defined(__ASSEMBLY__)
struct task_struct;
#include <asm/pda.h>
static inline struct task_struct *get_current(void)
{
struct task_struct *t = read_pda(pcurrent);
return t;
}
#define current get_current()
#else
#ifndef ASM_OFFSET_H
#include <asm/asm-offsets.h>
#endif
#define GET_CURRENT(reg) movq %gs:(pda_pcurrent),reg
#endif
#endif /* !(_X86_64_CURRENT_H) */