[PATCH v2 1/2] serial: 8250: export and rename wait_for_xmitr()

[Tate Whiteberg]

Export wait_for_xmitr() and rename it to follow naming convention.

Signed-off-by: Tate Whiteberg <whiteberg@xxxxxxxxxx>
---
Changes in v2:
  - Separate this patch from successor patch.

 drivers/tty/serial/8250/8250.h      |  1 +
 drivers/tty/serial/8250/8250_port.c | 13 +++++++------
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index 9337fec9394e..f99620b1cab7 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -180,6 +180,7 @@ void serial8250_clear_and_reinit_fifos(struct uart_8250_port *p);
 void serial8250_fifo_wait_for_lsr_thre(struct uart_8250_port *up,
 				       struct nbcon_write_context *wctxt,
 				       unsigned int count);
+void serial8250_wait_for_xmitr(struct uart_8250_port *up, int bits);
 
 void serial8250_rpm_get(struct uart_8250_port *p);
 void serial8250_rpm_put(struct uart_8250_port *p);
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 38fa45e74a37..4eaf417f1fd7 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -2024,7 +2024,7 @@ static bool wait_for_lsr(struct uart_8250_port *up, int bits)
 }
 
 /* Wait for transmitter and holding register to empty with timeout */
-static void wait_for_xmitr(struct uart_8250_port *up, int bits)
+void serial8250_wait_for_xmitr(struct uart_8250_port *up, int bits)
 {
 	unsigned int tmout;
 	bool tx_ready;
@@ -2052,6 +2052,7 @@ static void wait_for_xmitr(struct uart_8250_port *up, int bits)
 		}
 	}
 }
+EXPORT_SYMBOL_NS_GPL(serial8250_wait_for_xmitr, "SERIAL_8250");
 
 #ifdef CONFIG_CONSOLE_POLL
 /*
@@ -2098,7 +2099,7 @@ static void serial8250_put_poll_char(struct uart_port *port,
 	ier = serial_port_in(port, UART_IER);
 	__serial8250_clear_IER(up);
 
-	wait_for_xmitr(up, UART_LSR_BOTH_EMPTY);
+	serial8250_wait_for_xmitr(up, UART_LSR_BOTH_EMPTY);
 	/*
 	 *	Send the character out.
 	 */
@@ -2108,7 +2109,7 @@ static void serial8250_put_poll_char(struct uart_port *port,
 	 *	Finally, wait for transmitter to become empty
 	 *	and restore the IER
 	 */
-	wait_for_xmitr(up, UART_LSR_BOTH_EMPTY);
+	serial8250_wait_for_xmitr(up, UART_LSR_BOTH_EMPTY);
 	serial_port_out(port, UART_IER, ier);
 }
 
@@ -2223,7 +2224,7 @@ static void serial8250_THRE_test(struct uart_port *port)
 	 * Synchronize UART_IER access against the console.
 	 */
 	scoped_guard(uart_port_lock_irqsave, port) {
-		wait_for_xmitr(up, UART_LSR_THRE);
+		serial8250_wait_for_xmitr(up, UART_LSR_THRE);
 		serial_port_out_sync(port, UART_IER, UART_IER_THRI);
 		udelay(1); /* allow THRE to set */
 		iir_noint1 = serial_port_in(port, UART_IIR) & UART_IIR_NO_INT;
@@ -3293,7 +3294,7 @@ static void serial8250_console_wait_putchar(struct uart_port *port, unsigned cha
 {
 	struct uart_8250_port *up = up_to_u8250p(port);
 
-	wait_for_xmitr(up, UART_LSR_THRE);
+	serial8250_wait_for_xmitr(up, UART_LSR_THRE);
 	serial8250_console_putchar(port, ch);
 }
 
@@ -3504,7 +3505,7 @@ void serial8250_console_write(struct uart_8250_port *up,
 	 *	Finally, wait for transmitter to become empty
 	 *	and restore the IER
 	 */
-	wait_for_xmitr(up, UART_LSR_BOTH_EMPTY);
+	serial8250_wait_for_xmitr(up, UART_LSR_BOTH_EMPTY);
 
 	if (em485) {
 		mdelay(port->rs485.delay_rts_after_send);
-- 
2.43.0