LXR linux-old/include/linux/vmalloc.h

   1#ifndef __LINUX_VMALLOC_H
   2#define __LINUX_VMALLOC_H
   3
   4#include <linux/sched.h>
   5#include <linux/mm.h>
   6#include <linux/spinlock.h>
   7
   8#include <linux/highmem.h>      /* several arch define VMALLOC_END via PKMAP_BASE */
   9#include <asm/pgtable.h>
  10
  11/* bits in vm_struct->flags */
  12#define VM_IOREMAP      0x00000001      /* ioremap() and friends */
  13#define VM_ALLOC        0x00000002      /* vmalloc() */
  14
  15struct vm_struct {
  16        unsigned long flags;
  17        void * addr;
  18        unsigned long size;
  19        struct vm_struct * next;
  20};
  21
  22extern struct vm_struct * get_vm_area (unsigned long size, unsigned long flags);
  23extern void vfree(void * addr);
  24extern void * __vmalloc (unsigned long size, int gfp_mask, pgprot_t prot);
  25extern long vread(char *buf, char *addr, unsigned long count);
  26extern void vmfree_area_pages(unsigned long address, unsigned long size);
  27extern int vmalloc_area_pages(unsigned long address, unsigned long size,
  28                              int gfp_mask, pgprot_t prot);
  29
  30/*
  31 *      Allocate any pages
  32 */
  33 
  34static inline void * vmalloc (unsigned long size)
  35{
  36        return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL);
  37}
  38
  39/*
  40 *      Allocate ISA addressable pages for broke crap
  41 */
  42
  43static inline void * vmalloc_dma (unsigned long size)
  44{
  45        return __vmalloc(size, GFP_KERNEL|GFP_DMA, PAGE_KERNEL);
  46}
  47
  48/*
  49 *      vmalloc 32bit PA addressable pages - eg for PCI 32bit devices
  50 */
  51 
  52static inline void * vmalloc_32(unsigned long size)
  53{
  54        return __vmalloc(size, GFP_KERNEL, PAGE_KERNEL);
  55}
  56
  57/*
  58 * vmlist_lock is a read-write spinlock that protects vmlist
  59 * Used in mm/vmalloc.c (get_vm_area() and vfree()) and fs/proc/kcore.c.
  60 */
  61extern rwlock_t vmlist_lock;
  62
  63extern struct vm_struct * vmlist;
  64#endif
  65
  66