void * module_map (unsigned long size)
{
void * addr;
struct vm_struct **p, *tmp, *area;
size = PAGE_ALIGN(size);
if (!size || size > MODULES_LEN) return NULL;
addr = (void *) MODULES_VADDR;
for (p = &modvmlist; (tmp = *p) ; p = &tmp->next) {
if (size + (unsigned long) addr < (unsigned long) tmp->addr)
break;
addr = (void *) (tmp->size + (unsigned long) tmp->addr);
}
if ((unsigned long) addr + size >= MODULES_END) return NULL;
area = (struct vm_struct *) kmalloc(sizeof(*area), GFP_KERNEL);
if (!area) return NULL;
area->size = size + PAGE_SIZE;
area->addr = addr;
area->next = *p;
*p = area;
if (vmalloc_area_pages(VMALLOC_VMADDR(addr), size)) {
vfree(addr);
return NULL;
}
return addr;
}
void * vmalloc_prot(unsigned long size, pgprot_t prot)
{
void * addr;
struct vm_struct *area;
size = PAGE_ALIGN(size);
if (!size || size > (max_mapnr << PAGE_SHIFT))
return NULL;
area = get_vm_area(size);
if (!area)
return NULL;
addr = area->addr;
if (vmalloc_area_pages(VMALLOC_VMADDR(addr), size, prot)) {
vfree(addr);
return NULL;
}
return addr;
}
