| /* |
| * 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> |
| |
| #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 |
| |
| /* |
| * In Linux there is no way to determine whether current execution context is |
| * blockable. |
| */ |
| #define ALLOC_ATOMIC_TRY GFP_ATOMIC |
| |
| #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__ */ |