97 static void tty_buffer_reset(struct tty_buffer *p, size_t size)  in tty_buffer_reset()  argument
100 	p->size = size;  in tty_buffer_reset()
123 		if (p->size > 0)  in tty_buffer_free_all()
149 static struct tty_buffer *tty_buffer_alloc(struct tty_port *port, size_t size)  in tty_buffer_alloc()  argument
155 	size = __ALIGN_MASK(size, TTYB_ALIGN_MASK);  in tty_buffer_alloc()
157 	if (size <= MIN_TTYB_SIZE) {  in tty_buffer_alloc()
169 	p = kmalloc(sizeof(struct tty_buffer) + 2 * size, GFP_ATOMIC);  in tty_buffer_alloc()
174 	tty_buffer_reset(p, size);  in tty_buffer_alloc()
175 	atomic_add(size, &port->buf.mem_used);  in tty_buffer_alloc()
193 	WARN_ON(atomic_sub_return(b->size, &buf->mem_used) < 0);  in tty_buffer_free()
195 	if (b->size > MIN_TTYB_SIZE)  in tty_buffer_free()
197 	else if (b->size > 0)  in tty_buffer_free()
248 static int __tty_buffer_request_room(struct tty_port *port, size_t size,  in __tty_buffer_request_room()  argument
257 		left = 2 * b->size - b->used;  in __tty_buffer_request_room()
259 		left = b->size - b->used;  in __tty_buffer_request_room()
262 	if (change || left < size) {  in __tty_buffer_request_room()
264 		if ((n = tty_buffer_alloc(port, size)) != NULL) {  in __tty_buffer_request_room()
275 			size = 0;  in __tty_buffer_request_room()
277 			size = left;  in __tty_buffer_request_room()
279 	return size;  in __tty_buffer_request_room()
282 int tty_buffer_request_room(struct tty_port *port, size_t size)  in tty_buffer_request_room()  argument
284 	return __tty_buffer_request_room(port, size, 0);  in tty_buffer_request_room()
300 		const unsigned char *chars, char flag, size_t size)  in tty_insert_flip_string_fixed_flag()  argument
304 		int goal = min_t(size_t, size - copied, TTY_BUFFER_PAGE);  in tty_insert_flip_string_fixed_flag()
318 	} while (unlikely(size > copied));  in tty_insert_flip_string_fixed_flag()
336 		const unsigned char *chars, const char *flags, size_t size)  in tty_insert_flip_string_flags()  argument
340 		int goal = min_t(size_t, size - copied, TTY_BUFFER_PAGE);  in tty_insert_flip_string_flags()
353 	} while (unlikely(size > copied));  in tty_insert_flip_string_flags()
390 		size_t size)  in tty_prepare_flip_string()  argument
392 	int space = __tty_buffer_request_room(port, size, TTYB_NORMAL);  in tty_prepare_flip_string()