1 #ifndef __LINUX_VMALLOC_H
2 #define __LINUX_VMALLOC_H
4 #include <linux/sched.h>
6 #include <linux/spinlock.h>
8 #include <linux/highmem.h> /* several arch define VMALLOC_END via PKMAP_BASE */
9 #include <asm/pgtable.h>
11 /* bits in vm_struct->flags */
12 #define VM_IOREMAP 0x00000001 /* ioremap() and friends */
13 #define VM_ALLOC 0x00000002 /* vmalloc() */
19 struct vm_struct * next;
22 extern struct vm_struct * get_vm_area (unsigned long size, unsigned long flags);
23 extern void vfree(void * addr);
24 extern void * __vmalloc (unsigned long size, int gfp_mask, pgprot_t prot);
25 extern long vread(char *buf, char *addr, unsigned long count);
26 extern void vmfree_area_pages(unsigned long address, unsigned long size);
27 extern int vmalloc_area_pages(unsigned long address, unsigned long size,
28 int gfp_mask, pgprot_t prot);
34 static inline void * vmalloc (unsigned long size)
36 return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL);
40 * Allocate ISA addressable pages for broke crap
43 static inline void * vmalloc_dma (unsigned long size)
45 return __vmalloc(size, GFP_KERNEL|GFP_DMA, PAGE_KERNEL);
49 * vmalloc 32bit PA addressable pages - eg for PCI 32bit devices
52 static inline void * vmalloc_32(unsigned long size)
54 return __vmalloc(size, GFP_KERNEL, PAGE_KERNEL);
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.
61 extern rwlock_t vmlist_lock;
63 extern struct vm_struct * vmlist;