text: /*
   * GPL HEADER START
   *
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 only,
   * as published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * General Public License version 2 for more details (a copy is included
   * in the LICENSE file that accompanied this code).
   *
   * You should have received a copy of the GNU General Public License
   * version 2 along with this program; If not, see
   * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
   *
   * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
   * CA 95054 USA or visit www.sun.com if you need additional information or
   * have any questions.
   *
   * GPL HEADER END
   */
  /*
   * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
   * Use is subject to license terms.
   *
   * Copyright (c) 2011, 2012, Intel Corporation.
   */
  /*
   * This file is part of Lustre, http://www.lustre.org/
   * Lustre is a trademark of Sun Microsystems, Inc.
   *
   * libcfs/include/libcfs/linux/linux-mem.h
   *
   * Basic library routines.
   */
  
  #ifndef __LIBCFS_LINUX_CFS_MEM_H__
  #define __LIBCFS_LINUX_CFS_MEM_H__
  
  #ifndef __LIBCFS_LIBCFS_H__
  #error Do not #include this file directly. #include <linux/libcfs/libcfs.h> instead
  #endif
  
  #include <linux/mm.h>
  #include <linux/vmalloc.h>
  #include <linux/pagemap.h>
  #include <linux/slab.h>
  #include <linux/memcontrol.h>
  #include <linux/mm_inline.h>
  
  #ifndef HAVE_LIBCFS_CPT
  /* Need this for cfs_cpt_table */
  #include "../libcfs_cpu.h"
  #endif
  
  #define CFS_PAGE_MASK		   (~((__u64)PAGE_CACHE_SIZE-1))
  #define page_index(p)       ((p)->index)
  
  #define memory_pressure_get() (current->flags & PF_MEMALLOC)
  #define memory_pressure_set() do { current->flags |= PF_MEMALLOC; } while (0)
  #define memory_pressure_clr() do { current->flags &= ~PF_MEMALLOC; } while (0)
  
  #if BITS_PER_LONG == 32
  /* limit to lowmem on 32-bit systems */
  #define NUM_CACHEPAGES \
  	min(totalram_pages, 1UL << (30 - PAGE_CACHE_SHIFT) * 3 / 4)
  #else
  #define NUM_CACHEPAGES totalram_pages
  #endif
  
  #define DECL_MMSPACE		mm_segment_t __oldfs
  #define MMSPACE_OPEN \
  	do { __oldfs = get_fs(); set_fs(get_ds()); } while (0)
  #define MMSPACE_CLOSE	       set_fs(__oldfs)
  
  #endif /* __LINUX_CFS_MEM_H__ */
  