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#ifndef _ASM_X86_PDA_H
#define _ASM_X86_PDA_H
#ifndef __ASSEMBLY__
#include <linux/stddef.h>
#include <linux/types.h>
#include <linux/cache.h>
#include <linux/threads.h>
#include <asm/page.h>
#include <asm/percpu.h>
/* Per processor datastructure. %gs points to it while the kernel runs */
struct x8664_pda {
unsigned long unused1;
unsigned long unused2;
unsigned long unused3;
unsigned long unused4;
int unused5;
unsigned int unused6; /* 36 was cpunumber */
unsigned long stack_canary; /* 40 stack canary value */
/* gcc-ABI: this canary MUST be at
offset 40!!! */
short in_bootmem; /* pda lives in bootmem */
} ____cacheline_aligned_in_smp;
DECLARE_PER_CPU(struct x8664_pda, __pda);
extern void pda_init(int);
#define cpu_pda(cpu) (&per_cpu(__pda, cpu))
#define read_pda(field) percpu_read(__pda.field)
#define write_pda(field, val) percpu_write(__pda.field, val)
#define add_pda(field, val) percpu_add(__pda.field, val)
#define sub_pda(field, val) percpu_sub(__pda.field, val)
#define or_pda(field, val) percpu_or(__pda.field, val)
/* This is not atomic against other CPUs -- CPU preemption needs to be off */
#define test_and_clear_bit_pda(bit, field) \
x86_test_and_clear_bit_percpu(bit, __pda.field)
#endif
#define refresh_stack_canary() write_pda(stack_canary, current->stack_canary)
#endif /* _ASM_X86_PDA_H */
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