58 	uml_ldt_t *ldt = &current->mm->context.arch.ldt;  in read_ldt()  local
60 	if (!ldt->entry_count)  in read_ldt()
66 	mutex_lock(&ldt->lock);  in read_ldt()
67 	if (ldt->entry_count <= LDT_DIRECT_ENTRIES) {  in read_ldt()
71 		if (copy_to_user(ptr, ldt->u.entries, size))  in read_ldt()
77 		for (i=0; i<ldt->entry_count/LDT_ENTRIES_PER_PAGE && bytecount;  in read_ldt()
82 			if (copy_to_user(ptr, ldt->u.pages[i], size)) {  in read_ldt()
90 	mutex_unlock(&ldt->lock);  in read_ldt()
123 	uml_ldt_t *ldt = &current->mm->context.arch.ldt;  in write_ldt()  local
147 	mutex_lock(&ldt->lock);  in write_ldt()
153 	if (ldt_info.entry_number >= ldt->entry_count &&  in write_ldt()
155 		for (i=ldt->entry_count/LDT_ENTRIES_PER_PAGE;  in write_ldt()
159 				memcpy(&entry0, ldt->u.entries,  in write_ldt()
161 			ldt->u.pages[i] = (struct ldt_entry *)  in write_ldt()
163 			if (!ldt->u.pages[i]) {  in write_ldt()
171 				memcpy(ldt->u.pages[0], &entry0,  in write_ldt()
173 				memcpy(ldt->u.pages[0]+1, ldt->u.entries+1,  in write_ldt()
176 			ldt->entry_count = (i + 1) * LDT_ENTRIES_PER_PAGE;  in write_ldt()
179 	if (ldt->entry_count <= ldt_info.entry_number)  in write_ldt()
180 		ldt->entry_count = ldt_info.entry_number + 1;  in write_ldt()
182 	if (ldt->entry_count <= LDT_DIRECT_ENTRIES)  in write_ldt()
183 		ldt_p = ldt->u.entries + ldt_info.entry_number;  in write_ldt()
185 		ldt_p = ldt->u.pages[ldt_info.entry_number/LDT_ENTRIES_PER_PAGE] +  in write_ldt()
202 	mutex_unlock(&ldt->lock);  in write_ldt()
234 	struct ldt_entry * ldt;  in ldt_get_host_info()  local
251 	ldt = (struct ldt_entry *)  in ldt_get_host_info()
253 	if (ldt == NULL) {  in ldt_get_host_info()
259 	ret = modify_ldt(0, ldt, (1<<order)*PAGE_SIZE);  in ldt_get_host_info()
271 		if (ldt[i].a != 0 || ldt[i].b != 0)  in ldt_get_host_info()
289 		if (ldt[i].a != 0 || ldt[i].b != 0)  in ldt_get_host_info()
295 	free_pages((unsigned long)ldt, order);  in ldt_get_host_info()
307 	mutex_init(&new_mm->arch.ldt.lock);  in init_new_ldt()
324 		new_mm->arch.ldt.entry_count = 0;  in init_new_ldt()
335 	mutex_lock(&from_mm->arch.ldt.lock);  in init_new_ldt()
336 	if (from_mm->arch.ldt.entry_count <= LDT_DIRECT_ENTRIES)  in init_new_ldt()
337 		memcpy(new_mm->arch.ldt.u.entries, from_mm->arch.ldt.u.entries,  in init_new_ldt()
338 		       sizeof(new_mm->arch.ldt.u.entries));  in init_new_ldt()
340 		i = from_mm->arch.ldt.entry_count / LDT_ENTRIES_PER_PAGE;  in init_new_ldt()
347 			new_mm->arch.ldt.u.pages[i] =  in init_new_ldt()
349 			memcpy(new_mm->arch.ldt.u.pages[i],  in init_new_ldt()
350 			       from_mm->arch.ldt.u.pages[i], PAGE_SIZE);  in init_new_ldt()
353 	new_mm->arch.ldt.entry_count = from_mm->arch.ldt.entry_count;  in init_new_ldt()
354 	mutex_unlock(&from_mm->arch.ldt.lock);  in init_new_ldt()
365 	if (mm->arch.ldt.entry_count > LDT_DIRECT_ENTRIES) {  in free_ldt()
366 		i = mm->arch.ldt.entry_count / LDT_ENTRIES_PER_PAGE;  in free_ldt()
368 			free_page((long) mm->arch.ldt.u.pages[i]);  in free_ldt()
370 	mm->arch.ldt.entry_count = 0;  in free_ldt()