serial: stm32: mark symbols static where possible

We get 2 warnings when building kernel with W=1:
drivers/tty/serial/stm32-usart.c:63:5: warning: no previous prototype for 'stm32_pending_rx' [-Wmissing-prototypes]
drivers/tty/serial/stm32-usart.c:88:15: warning: no previous prototype for 'stm32_get_char' [-Wmissing-prototypes]

In fact, these two functions are only used in the file in which they are
declared and don't need a declaration, but can be made static.

So this patch marks these functions with 'static'.

Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index 2adb678a863bf8e7f23a7977e03372b8671a4e67..033856287ca21268ded24f646fc04d4f0354715c 100644 (file)
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -60,8 +60,8 @@ static void stm32_clr_bits(struct uart_port *port, u32 reg, u32 bits)
        writel_relaxed(val, port->membase + reg);
 }
 
-int stm32_pending_rx(struct uart_port *port, u32 *sr, int *last_res,
-                    bool threaded)
+static int stm32_pending_rx(struct uart_port *port, u32 *sr, int *last_res,
+                           bool threaded)
 {
        struct stm32_port *stm32_port = to_stm32_port(port);
        struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
@@ -85,7 +85,8 @@ int stm32_pending_rx(struct uart_port *port, u32 *sr, int *last_res,
        return 0;
 }
 
-unsigned long stm32_get_char(struct uart_port *port, u32 *sr, int *last_res)
+static unsigned long
+stm32_get_char(struct uart_port *port, u32 *sr, int *last_res)
 {
        struct stm32_port *stm32_port = to_stm32_port(port);
        struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;