Viewing file:  vmalloc.h (1.54 KB) -rw-r--r--
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#ifndef __LINUX_VMALLOC_H
#define __LINUX_VMALLOC_H
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/spinlock.h>
#include <asm/pgtable.h>
/* bits in vm_struct->flags */
#define VM_IOREMAP 0x00000001 /* ioremap() and friends */
#define VM_ALLOC 0x00000002 /* vmalloc() */
struct vm_struct {
unsigned long flags;
void * addr;
unsigned long size;
struct vm_struct * next;
};
extern struct vm_struct * get_vm_area (unsigned long size, unsigned long flags);
extern void vfree(void * addr);
extern void * __vmalloc (unsigned long size, int gfp_mask, pgprot_t prot);
extern long vread(char *buf, char *addr, unsigned long count);
extern void vmfree_area_pages(unsigned long address, unsigned long size);
extern int vmalloc_area_pages(unsigned long address, unsigned long size,
int gfp_mask, pgprot_t prot);
/*
* Allocate any pages
*/
static inline void * vmalloc (unsigned long size)
{
return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL);
}
/*
* Allocate ISA addressable pages for broke crap
*/
static inline void * vmalloc_dma (unsigned long size)
{
return __vmalloc(size, GFP_KERNEL|GFP_DMA, PAGE_KERNEL);
}
/*
* vmalloc 32bit PA addressable pages - eg for PCI 32bit devices
*/
static inline void * vmalloc_32(unsigned long size)
{
return __vmalloc(size, GFP_KERNEL, PAGE_KERNEL);
}
/*
* vmlist_lock is a read-write spinlock that protects vmlist
* Used in mm/vmalloc.c (get_vm_area() and vfree()) and fs/proc/kcore.c.
*/
extern rwlock_t vmlist_lock;
extern struct vm_struct * vmlist;
#endif
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