serial: tegra: use NULL instead of 0

'cons' is a pointer; thus NULL should be used instead of 0.
Also, local symbols are staticized.
Fix the following sparse warnings:

drivers/tty/serial/serial-tegra.c:1209:27: warning: Using plain integer as NULL pointer
drivers/tty/serial/serial-tegra.c:1240:29: warning: symbol 'tegra20_uart_chip_data' was not declared. Should it be static?
drivers/tty/serial/serial-tegra.c:1246:29: warning: symbol 'tegra30_uart_chip_data' was not declared. Should it be static?

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c
index ee7c8123c374aa18b22a88a564d0f89008c07acb..94a24845db4b88d4471eb8007c93963d933d51c3 100644 (file)
--- a/drivers/tty/serial/serial-tegra.c
+++ b/drivers/tty/serial/serial-tegra.c
@@ -1206,7 +1206,7 @@ static struct uart_driver tegra_uart_driver = {
        .owner          = THIS_MODULE,
        .driver_name    = "tegra_hsuart",
        .dev_name       = "ttyTHS",
-       .cons           = 0,
+       .cons           = NULL,
        .nr             = TEGRA_UART_MAXIMUM,
 };
 
@@ -1237,13 +1237,13 @@ static int tegra_uart_parse_dt(struct platform_device *pdev,
        return 0;
 }
 
-struct tegra_uart_chip_data tegra20_uart_chip_data = {
+static struct tegra_uart_chip_data tegra20_uart_chip_data = {
        .tx_fifo_full_status            = false,
        .allow_txfifo_reset_fifo_mode   = true,
        .support_clk_src_div            = false,
 };
 
-struct tegra_uart_chip_data tegra30_uart_chip_data = {
+static struct tegra_uart_chip_data tegra30_uart_chip_data = {
        .tx_fifo_full_status            = true,
        .allow_txfifo_reset_fifo_mode   = false,
        .support_clk_src_div            = true,