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#ifndef __x86_64_MMU_H
#define __x86_64_MMU_H
#include <linux/spinlock.h>
#include <asm/semaphore.h>
/*
* The x86_64 doesn't have a mmu context, but
* we put the segment information here.
*
* cpu_vm_mask is used to optimize ldt flushing.
*/
typedef struct {
void *ldt;
rwlock_t ldtlock;
int size;
struct semaphore sem;
#ifdef CONFIG_XEN
unsigned pinned:1;
unsigned has_foreign_mappings:1;
struct list_head unpinned;
#endif
#ifndef __GENKSYMS__
void *vdso;
#endif
} mm_context_t;
#ifdef CONFIG_XEN
extern struct list_head mm_unpinned;
extern spinlock_t mm_unpinned_lock;
/* mm/memory.c:exit_mmap hook */
extern void _arch_exit_mmap(struct mm_struct *mm);
#define arch_exit_mmap(_mm) _arch_exit_mmap(_mm)
/* kernel/fork.c:dup_mmap hook */
extern void _arch_dup_mmap(struct mm_struct *mm);
#define arch_dup_mmap(mm, oldmm) ((void)(oldmm), _arch_dup_mmap(mm))
#endif
#endif