2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include <linux/spinlock.h>
32 #include <linux/gfp.h>
33 #include <linux/kernel.h>
35 #define PAGE_ALIGN(x) ALIGN(x, PAGE_SIZE)
37 struct vm_area_struct {
41 vm_paddr_t vm_pfn; /* PFN For mmap. */
42 vm_memattr_t vm_page_prot;
46 * Compute log2 of the power of two rounded up count of pages
47 * needed for size bytes.
50 get_order(unsigned long size)
54 size = (size - 1) >> PAGE_SHIFT;
64 lowmem_page_address(struct page *page)
67 return page_address(page);
71 * This only works via mmap ops.
74 io_remap_pfn_range(struct vm_area_struct *vma,
75 unsigned long addr, unsigned long pfn, unsigned long size,
78 vma->vm_page_prot = prot;
84 #endif /* _LINUX_MM_H_ */