26  * Find or create vm block based on requested @size.
32 	struct ct_vm_block *block = NULL, *entry;  in get_vm_block()  local
46 			break; /* found a block that is big enough */  in get_vm_block()
55 		block = entry;  in get_vm_block()
59 	block = kzalloc(sizeof(*block), GFP_KERNEL);  in get_vm_block()
60 	if (!block)  in get_vm_block()
63 	block->addr = entry->addr;  in get_vm_block()
64 	block->size = size;  in get_vm_block()
65 	list_add(&block->list, &vm->used);  in get_vm_block()
72 	return block;  in get_vm_block()
75 static void put_vm_block(struct ct_vm *vm, struct ct_vm_block *block)  in put_vm_block()  argument
80 	block->size = CT_PAGE_ALIGN(block->size);  in put_vm_block()
83 	list_del(&block->list);  in put_vm_block()
84 	vm->size += block->size;  in put_vm_block()
88 		if (entry->addr >= (block->addr + block->size))  in put_vm_block()
92 		list_add_tail(&block->list, &vm->unused);  in put_vm_block()
93 		entry = block;  in put_vm_block()
95 		if ((block->addr + block->size) == entry->addr) {  in put_vm_block()
96 			entry->addr = block->addr;  in put_vm_block()
97 			entry->size += block->size;  in put_vm_block()
98 			kfree(block);  in put_vm_block()
100 			__list_add(&block->list, pos->prev, pos);  in put_vm_block()
101 			entry = block;  in put_vm_block()
126 	struct ct_vm_block *block;  in ct_vm_map()  local
132 	block = get_vm_block(vm, size, atc);  in ct_vm_map()
133 	if (block == NULL) {  in ct_vm_map()
135 			"No virtual memory block that is big enough to allocate!\n");  in ct_vm_map()
140 	pte_start = (block->addr >> CT_PAGE_SHIFT);  in ct_vm_map()
141 	pages = block->size >> CT_PAGE_SHIFT;  in ct_vm_map()
148 	block->size = size;  in ct_vm_map()
149 	return block;  in ct_vm_map()
152 static void ct_vm_unmap(struct ct_vm *vm, struct ct_vm_block *block)  in ct_vm_unmap()  argument
155 	put_vm_block(vm, block);  in ct_vm_unmap()
172 	struct ct_vm_block *block;  in ct_vm_create()  local
202 	block = kzalloc(sizeof(*block), GFP_KERNEL);  in ct_vm_create()
203 	if (NULL != block) {  in ct_vm_create()
204 		block->addr = 0;  in ct_vm_create()
205 		block->size = vm->size;  in ct_vm_create()
206 		list_add(&block->list, &vm->unused);  in ct_vm_create()