#include <linux/mm_types.h>
  #include <linux/rbtree.h>
  #include <linux/rwsem.h>
  #include <linux/spinlock.h>
  #include <linux/list.h>
  #include <linux/cpumask.h>

  #include <linux/atomic.h>

  #include <asm/pgtable.h>

  #include <asm/mmu.h>
  
  #ifndef INIT_MM_CONTEXT
  #define INIT_MM_CONTEXT(name)
  #endif

  
  struct mm_struct init_mm = {
  	.mm_rb		= RB_ROOT,
  	.pgd		= swapper_pg_dir,
  	.mm_users	= ATOMIC_INIT(2),
  	.mm_count	= ATOMIC_INIT(1),
  	.mmap_sem	= __RWSEM_INITIALIZER(init_mm.mmap_sem),
  	.page_table_lock =  __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock),
  	.mmlist		= LIST_HEAD_INIT(init_mm.mmlist),

  	INIT_MM_CONTEXT(init_mm)

  };