include/linux/vmalloc.h

   1 #ifndef __LINUX_VMALLOC_H
   2 #define __LINUX_VMALLOC_H
   3
   4 #include <linux/spinlock.h>
   5
   6 #include <asm/pgtable.h>
   7
   8 /* bits in vm_struct->flags */
   9 #define VM_IOREMAP      0x00000001      /* ioremap() and friends */
  10 #define VM_ALLOC        0x00000002      /* vmalloc() */
  11
  12 struct vm_struct {
  13         unsigned long flags;
  14         void * addr;
  15         unsigned long size;
  16         unsigned long phys_addr;
  17         struct vm_struct * next;
  18 };
  19
  20 extern struct vm_struct * get_vm_area (unsigned long size, unsigned long flags);
  21 extern void vfree(void * addr);
  22 extern void * __vmalloc (unsigned long size, int gfp_mask, pgprot_t prot);
  23 extern long vread(char *buf, char *addr, unsigned long count);
  24 extern void vmfree_area_pages(unsigned long address, unsigned long size);
  25 extern int vmalloc_area_pages(unsigned long address, unsigned long size,
  26                               int gfp_mask, pgprot_t prot);
  27 extern struct vm_struct *remove_kernel_area(void *addr);
  28
  29 /*
  30  * Various ways to allocate pages.
  31  */
  32
  33 extern void * vmalloc(unsigned long size);
  34 extern void * vmalloc_32(unsigned long size);
  35
  36 /*
  37  * vmlist_lock is a read-write spinlock that protects vmlist
  38  * Used in mm/vmalloc.c (get_vm_area() and vfree()) and fs/proc/kcore.c.
  39  */
  40 extern rwlock_t vmlist_lock;
  41
  42 extern struct vm_struct * vmlist;
  43 #endif
  44