[PATCH 10/11] serial: make uart_console_write->putchar()'s character a char

From: Jiri Slaby
Date: Mon Jan 24 2022 - 02:14:59 EST

Currently, uart_console_write->putchar's second parameter (the
character) is of type int. It makes little sense, provided uart_console_write()
accepts the input string as "const char *s" and passes its content -- the
characters -- to putchar(). So switch the character's type also to char.

This makes the types consistent.

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Cc: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
Cc: Tobias Klauser <tklauser@xxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Vineet Gupta <vgupta@xxxxxxxxxx>
Cc: Richard Genoud <richard.genoud@xxxxxxxxx>
Cc: Nicolas Ferre <nicolas.ferre@xxxxxxxxxxxxx>
Cc: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Cc: Ludovic Desroches <ludovic.desroches@xxxxxxxxxxxxx>
Cc: Florian Fainelli <f.fainelli@xxxxxxxxx>
Cc: Alexander Shiyan <shc_work@xxxxxxx>
Cc: Baruch Siach <baruch@xxxxxxxxxx>
Cc: "Maciej W. Rozycki" <macro@xxxxxxxxxxx>
Cc: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx>
Cc: Albert Ou <aou@xxxxxxxxxxxxxxxxx>
Cc: Shawn Guo <shawnguo@xxxxxxxxxx>
Cc: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Cc: Pengutronix Kernel Team <kernel@xxxxxxxxxxxxxx>
Cc: Fabio Estevam <festevam@xxxxxxxxx>
Cc: NXP Linux Team <linux-imx@xxxxxxx>
Cc: Karol Gugala <kgugala@xxxxxxxxxxxx>
Cc: Mateusz Holenko <mholenko@xxxxxxxxxxxx>
Cc: Vladimir Zapolskiy <vz@xxxxxxxxx>
Cc: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Cc: Kevin Hilman <khilman@xxxxxxxxxxxx>
Cc: Jerome Brunet <jbrunet@xxxxxxxxxxxx>
Cc: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
Cc: Taichi Sugaya <sugaya.taichi@xxxxxxxxxxxxx>
Cc: Takao Orito <orito.takao@xxxxxxxxxxxxx>
Cc: Liviu Dudau <liviu.dudau@xxxxxxx>
Cc: Sudeep Holla <sudeep.holla@xxxxxxx>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Cc: "Andreas Färber" <afaerber@xxxxxxx>
Cc: Manivannan Sadhasivam <mani@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Andy Gross <agross@xxxxxxxxxx>
Cc: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
Cc: Orson Zhai <orsonzhai@xxxxxxxxx>
Cc: Baolin Wang <baolin.wang7@xxxxxxxxx>
Cc: Chunyan Zhang <zhang.lyra@xxxxxxxxx>
Cc: Patrice Chotard <patrice.chotard@xxxxxxxxxxx>
Cc: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
Cc: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Peter Korsgaard <jacmet@xxxxxxxxxx>
Cc: Michal Simek <michal.simek@xxxxxxxxxx>
---
drivers/tty/goldfish.c | 2 +-
drivers/tty/hvc/hvc_dcc.c | 2 +-
drivers/tty/serial/21285.c | 2 +-
drivers/tty/serial/8250/8250_early.c | 2 +-
drivers/tty/serial/8250/8250_ingenic.c | 2 +-
drivers/tty/serial/8250/8250_port.c | 2 +-
drivers/tty/serial/altera_jtaguart.c | 4 ++--
drivers/tty/serial/altera_uart.c | 2 +-
drivers/tty/serial/amba-pl010.c | 2 +-
drivers/tty/serial/amba-pl011.c | 6 +++---
drivers/tty/serial/apbuart.c | 2 +-
drivers/tty/serial/ar933x_uart.c | 2 +-
drivers/tty/serial/arc_uart.c | 2 +-
drivers/tty/serial/atmel_serial.c | 2 +-
drivers/tty/serial/bcm63xx_uart.c | 2 +-
drivers/tty/serial/clps711x.c | 2 +-
drivers/tty/serial/digicolor-usart.c | 2 +-
drivers/tty/serial/dz.c | 2 +-
drivers/tty/serial/earlycon-arm-semihost.c | 2 +-
drivers/tty/serial/earlycon-riscv-sbi.c | 2 +-
drivers/tty/serial/fsl_linflexuart.c | 4 ++--
drivers/tty/serial/fsl_lpuart.c | 4 ++--
drivers/tty/serial/imx.c | 2 +-
drivers/tty/serial/imx_earlycon.c | 2 +-
drivers/tty/serial/ip22zilog.c | 2 +-
drivers/tty/serial/lantiq.c | 2 +-
drivers/tty/serial/liteuart.c | 2 +-
drivers/tty/serial/lpc32xx_hs.c | 2 +-
drivers/tty/serial/meson_uart.c | 2 +-
drivers/tty/serial/milbeaut_usio.c | 2 +-
drivers/tty/serial/mps2-uart.c | 4 ++--
drivers/tty/serial/mvebu-uart.c | 4 ++--
drivers/tty/serial/mxs-auart.c | 2 +-
drivers/tty/serial/omap-serial.c | 2 +-
drivers/tty/serial/owl-uart.c | 2 +-
drivers/tty/serial/pch_uart.c | 2 +-
drivers/tty/serial/pic32_uart.c | 2 +-
drivers/tty/serial/pmac_zilog.c | 2 +-
drivers/tty/serial/pxa.c | 2 +-
drivers/tty/serial/qcom_geni_serial.c | 2 +-
drivers/tty/serial/rda-uart.c | 2 +-
drivers/tty/serial/sa1100.c | 2 +-
drivers/tty/serial/samsung_tty.c | 4 ++--
drivers/tty/serial/sb1250-duart.c | 2 +-
drivers/tty/serial/sccnxp.c | 2 +-
drivers/tty/serial/serial_core.c | 2 +-
drivers/tty/serial/serial_txx9.c | 2 +-
drivers/tty/serial/sh-sci.c | 2 +-
drivers/tty/serial/sifive.c | 4 ++--
drivers/tty/serial/sprd_serial.c | 2 +-
drivers/tty/serial/st-asc.c | 2 +-
drivers/tty/serial/stm32-usart.c | 2 +-
drivers/tty/serial/sunsu.c | 2 +-
drivers/tty/serial/sunzilog.c | 4 ++--
drivers/tty/serial/uartlite.c | 4 ++--
drivers/tty/serial/vr41xx_siu.c | 2 +-
drivers/tty/serial/vt8500_serial.c | 2 +-
drivers/tty/serial/xilinx_uartps.c | 2 +-
drivers/tty/serial/zs.c | 2 +-
include/linux/serial_core.h | 2 +-
60 files changed, 71 insertions(+), 71 deletions(-)

diff --git a/drivers/tty/goldfish.c b/drivers/tty/goldfish.c
index 5ed19a9857ad..bf51559c0ad3 100644
--- a/drivers/tty/goldfish.c
+++ b/drivers/tty/goldfish.c
@@ -434,7 +434,7 @@ static int goldfish_tty_remove(struct platform_device *pdev)
}

#ifdef CONFIG_GOLDFISH_TTY_EARLY_CONSOLE
-static void gf_early_console_putchar(struct uart_port *port, int ch)
+static void gf_early_console_putchar(struct uart_port *port, char ch)
{
__raw_writel(ch, port->membase);
}
diff --git a/drivers/tty/hvc/hvc_dcc.c b/drivers/tty/hvc/hvc_dcc.c
index 8e0edb7d93fd..5fa5e3144011 100644
--- a/drivers/tty/hvc/hvc_dcc.c
+++ b/drivers/tty/hvc/hvc_dcc.c
@@ -15,7 +15,7 @@
#define DCC_STATUS_RX (1 << 30)
#define DCC_STATUS_TX (1 << 29)

-static void dcc_uart_console_putchar(struct uart_port *port, int ch)
+static void dcc_uart_console_putchar(struct uart_port *port, char ch)
{
while (__dcc_getstatus() & DCC_STATUS_TX)
cpu_relax();
diff --git a/drivers/tty/serial/21285.c b/drivers/tty/serial/21285.c
index 09baef4ccc39..2d32b151191f 100644
--- a/drivers/tty/serial/21285.c
+++ b/drivers/tty/serial/21285.c
@@ -403,7 +403,7 @@ static void serial21285_setup_ports(void)
}

#ifdef CONFIG_SERIAL_21285_CONSOLE
-static void serial21285_console_putchar(struct uart_port *port, int ch)
+static void serial21285_console_putchar(struct uart_port *port, char ch)
{
while (*CSR_UARTFLG & 0x20)
barrier();
diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c
index c171ce6db691..4dedab072922 100644
--- a/drivers/tty/serial/8250/8250_early.c
+++ b/drivers/tty/serial/8250/8250_early.c
@@ -86,7 +86,7 @@ static void serial8250_early_out(struct uart_port *port, int offset, int value)

#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)

-static void serial_putc(struct uart_port *port, int c)
+static void serial_putc(struct uart_port *port, char c)
{
unsigned int status;

diff --git a/drivers/tty/serial/8250/8250_ingenic.c b/drivers/tty/serial/8250/8250_ingenic.c
index 65402d05eff9..269c544113d3 100644
--- a/drivers/tty/serial/8250/8250_ingenic.c
+++ b/drivers/tty/serial/8250/8250_ingenic.c
@@ -52,7 +52,7 @@ static void early_out(struct uart_port *port, int offset, uint8_t value)
writel(value, port->membase + (offset << 2));
}

-static void ingenic_early_console_putc(struct uart_port *port, int c)
+static void ingenic_early_console_putc(struct uart_port *port, char c)
{
uint8_t lsr;

diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 2abb3de11a48..5becb36f40fc 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -3303,7 +3303,7 @@ EXPORT_SYMBOL_GPL(serial8250_set_defaults);

#ifdef CONFIG_SERIAL_8250_CONSOLE

-static void serial8250_console_putchar(struct uart_port *port, int ch)
+static void serial8250_console_putchar(struct uart_port *port, char ch)
{
struct uart_8250_port *up = up_to_u8250p(port);

diff --git a/drivers/tty/serial/altera_jtaguart.c b/drivers/tty/serial/altera_jtaguart.c
index 37bffe406b18..9b22ce8b69f5 100644
--- a/drivers/tty/serial/altera_jtaguart.c
+++ b/drivers/tty/serial/altera_jtaguart.c
@@ -298,7 +298,7 @@ static struct altera_jtaguart altera_jtaguart_ports[ALTERA_JTAGUART_MAXPORTS];
#if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE)

#if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE_BYPASS)
-static void altera_jtaguart_console_putc(struct uart_port *port, int c)
+static void altera_jtaguart_console_putc(struct uart_port *port, char c)
{
unsigned long status;
unsigned long flags;
@@ -318,7 +318,7 @@ static void altera_jtaguart_console_putc(struct uart_port *port, int c)
spin_unlock_irqrestore(&port->lock, flags);
}
#else
-static void altera_jtaguart_console_putc(struct uart_port *port, int c)
+static void altera_jtaguart_console_putc(struct uart_port *port, char c)
{
unsigned long flags;

diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c
index 64a352b40197..243c30a7c700 100644
--- a/drivers/tty/serial/altera_uart.c
+++ b/drivers/tty/serial/altera_uart.c
@@ -438,7 +438,7 @@ static struct altera_uart altera_uart_ports[CONFIG_SERIAL_ALTERA_UART_MAXPORTS];

#if defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE)

-static void altera_uart_console_putc(struct uart_port *port, int c)
+static void altera_uart_console_putc(struct uart_port *port, char c)
{
while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
ALTERA_UART_STATUS_TRDY_MSK))
diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c
index 47654073123d..5f6e50348cdd 100644
--- a/drivers/tty/serial/amba-pl010.c
+++ b/drivers/tty/serial/amba-pl010.c
@@ -556,7 +556,7 @@ static struct uart_amba_port *amba_ports[UART_NR];

#ifdef CONFIG_SERIAL_AMBA_PL010_CONSOLE

-static void pl010_console_putchar(struct uart_port *port, int ch)
+static void pl010_console_putchar(struct uart_port *port, char ch)
{
struct uart_amba_port *uap =
container_of(port, struct uart_amba_port, port);
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 1f1df46242f9..ff94edbcd791 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -2264,7 +2264,7 @@ static struct uart_amba_port *amba_ports[UART_NR];

#ifdef CONFIG_SERIAL_AMBA_PL011_CONSOLE

-static void pl011_console_putchar(struct uart_port *port, int ch)
+static void pl011_console_putchar(struct uart_port *port, char ch)
{
struct uart_amba_port *uap =
container_of(port, struct uart_amba_port, port);
@@ -2480,7 +2480,7 @@ static struct console amba_console = {

#define AMBA_CONSOLE (&amba_console)

-static void qdf2400_e44_putc(struct uart_port *port, int c)
+static void qdf2400_e44_putc(struct uart_port *port, char c)
{
while (readl(port->membase + UART01x_FR) & UART01x_FR_TXFF)
cpu_relax();
@@ -2496,7 +2496,7 @@ static void qdf2400_e44_early_write(struct console *con, const char *s, unsigned
uart_console_write(&dev->port, s, n, qdf2400_e44_putc);
}

-static void pl011_putc(struct uart_port *port, int c)
+static void pl011_putc(struct uart_port *port, char c)
{
while (readl(port->membase + UART01x_FR) & UART01x_FR_TXFF)
cpu_relax();
diff --git a/drivers/tty/serial/apbuart.c b/drivers/tty/serial/apbuart.c
index d8c937bdf3f9..1dd08c1a7685 100644
--- a/drivers/tty/serial/apbuart.c
+++ b/drivers/tty/serial/apbuart.c
@@ -413,7 +413,7 @@ static void apbuart_flush_fifo(struct uart_port *port)

#ifdef CONFIG_SERIAL_GRLIB_GAISLER_APBUART_CONSOLE

-static void apbuart_console_putchar(struct uart_port *port, int ch)
+static void apbuart_console_putchar(struct uart_port *port, char ch)
{
unsigned int status;
do {
diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c
index 8cabe50c4a33..92dea51ff2ec 100644
--- a/drivers/tty/serial/ar933x_uart.c
+++ b/drivers/tty/serial/ar933x_uart.c
@@ -613,7 +613,7 @@ static void ar933x_uart_wait_xmitr(struct ar933x_uart_port *up)
} while ((status & AR933X_UART_DATA_TX_CSR) == 0);
}

-static void ar933x_uart_console_putchar(struct uart_port *port, int ch)
+static void ar933x_uart_console_putchar(struct uart_port *port, char ch)
{
struct ar933x_uart_port *up =
container_of(port, struct ar933x_uart_port, port);
diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c
index 596217d10d5c..e07950ed00b0 100644
--- a/drivers/tty/serial/arc_uart.c
+++ b/drivers/tty/serial/arc_uart.c
@@ -508,7 +508,7 @@ static int arc_serial_console_setup(struct console *co, char *options)
return uart_set_options(port, co, baud, parity, bits, flow);
}

-static void arc_serial_console_putchar(struct uart_port *port, int ch)
+static void arc_serial_console_putchar(struct uart_port *port, char ch)
{
while (!(UART_GET_STATUS(port) & TXEMPTY))
cpu_relax();
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 2d09a89974a2..e86513227894 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -2541,7 +2541,7 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port,
}

#ifdef CONFIG_SERIAL_ATMEL_CONSOLE
-static void atmel_console_putchar(struct uart_port *port, int ch)
+static void atmel_console_putchar(struct uart_port *port, char ch)
{
while (!(atmel_uart_readl(port, ATMEL_US_CSR) & ATMEL_US_TXRDY))
cpu_relax();
diff --git a/drivers/tty/serial/bcm63xx_uart.c b/drivers/tty/serial/bcm63xx_uart.c
index 6471a54b616b..50943281b599 100644
--- a/drivers/tty/serial/bcm63xx_uart.c
+++ b/drivers/tty/serial/bcm63xx_uart.c
@@ -681,7 +681,7 @@ static void wait_for_xmitr(struct uart_port *port)
/*
* output given char
*/
-static void bcm_console_putchar(struct uart_port *port, int ch)
+static void bcm_console_putchar(struct uart_port *port, char ch)
{
wait_for_xmitr(port);
bcm_uart_writel(port, ch, UART_FIFO_REG);
diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c
index 95abc6faa3d5..36bc82ef7951 100644
--- a/drivers/tty/serial/clps711x.c
+++ b/drivers/tty/serial/clps711x.c
@@ -348,7 +348,7 @@ static const struct uart_ops uart_clps711x_ops = {
};

#ifdef CONFIG_SERIAL_CLPS711X_CONSOLE
-static void uart_clps711x_console_putchar(struct uart_port *port, int ch)
+static void uart_clps711x_console_putchar(struct uart_port *port, char ch)
{
struct clps711x_port *s = dev_get_drvdata(port->dev);
u32 sysflg = 0;
diff --git a/drivers/tty/serial/digicolor-usart.c b/drivers/tty/serial/digicolor-usart.c
index 13ac36e2da4f..0641b1c6d1c3 100644
--- a/drivers/tty/serial/digicolor-usart.c
+++ b/drivers/tty/serial/digicolor-usart.c
@@ -381,7 +381,7 @@ static const struct uart_ops digicolor_uart_ops = {
.request_port = digicolor_uart_request_port,
};

-static void digicolor_uart_console_putchar(struct uart_port *port, int ch)
+static void digicolor_uart_console_putchar(struct uart_port *port, char ch)
{
while (digicolor_uart_tx_full(port))
cpu_relax();
diff --git a/drivers/tty/serial/dz.c b/drivers/tty/serial/dz.c
index e9edabc5a211..3493e201d67f 100644
--- a/drivers/tty/serial/dz.c
+++ b/drivers/tty/serial/dz.c
@@ -802,7 +802,7 @@ static void __init dz_init_ports(void)
* restored. Welcome to the world of PDP-11!
* -------------------------------------------------------------------
*/
-static void dz_console_putchar(struct uart_port *uport, int ch)
+static void dz_console_putchar(struct uart_port *uport, char ch)
{
struct dz_port *dport = to_dport(uport);
unsigned long flags;
diff --git a/drivers/tty/serial/earlycon-arm-semihost.c b/drivers/tty/serial/earlycon-arm-semihost.c
index fa096c10b591..01d63aace0d9 100644
--- a/drivers/tty/serial/earlycon-arm-semihost.c
+++ b/drivers/tty/serial/earlycon-arm-semihost.c
@@ -21,7 +21,7 @@
/*
* Semihosting-based debug console
*/
-static void smh_putc(struct uart_port *port, int c)
+static void smh_putc(struct uart_port *port, char c)
{
#ifdef CONFIG_ARM64
asm volatile("mov x1, %0\n"
diff --git a/drivers/tty/serial/earlycon-riscv-sbi.c b/drivers/tty/serial/earlycon-riscv-sbi.c
index ce81523c3113..95dbd1a9a48e 100644
--- a/drivers/tty/serial/earlycon-riscv-sbi.c
+++ b/drivers/tty/serial/earlycon-riscv-sbi.c
@@ -10,7 +10,7 @@
#include <linux/serial_core.h>
#include <asm/sbi.h>

-static void sbi_putc(struct uart_port *port, int c)
+static void sbi_putc(struct uart_port *port, char c)
{
sbi_console_putchar(c);
}
diff --git a/drivers/tty/serial/fsl_linflexuart.c b/drivers/tty/serial/fsl_linflexuart.c
index e72cba085743..cac2b33d2a66 100644
--- a/drivers/tty/serial/fsl_linflexuart.c
+++ b/drivers/tty/serial/fsl_linflexuart.c
@@ -553,7 +553,7 @@ static const struct uart_ops linflex_pops = {
static struct uart_port *linflex_ports[UART_NR];

#ifdef CONFIG_SERIAL_FSL_LINFLEXUART_CONSOLE
-static void linflex_console_putchar(struct uart_port *port, int ch)
+static void linflex_console_putchar(struct uart_port *port, char ch)
{
unsigned long cr;

@@ -578,7 +578,7 @@ static void linflex_console_putchar(struct uart_port *port, int ch)
}
}

-static void linflex_earlycon_putchar(struct uart_port *port, int ch)
+static void linflex_earlycon_putchar(struct uart_port *port, char ch)
{
unsigned long flags;
char *ret;
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index ce3e26144689..b65f9bea67d4 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -2327,13 +2327,13 @@ static const struct uart_ops lpuart32_pops = {
static struct lpuart_port *lpuart_ports[UART_NR];

#ifdef CONFIG_SERIAL_FSL_LPUART_CONSOLE
-static void lpuart_console_putchar(struct uart_port *port, int ch)
+static void lpuart_console_putchar(struct uart_port *port, char ch)
{
lpuart_wait_bit_set(port, UARTSR1, UARTSR1_TDRE);
writeb(ch, port->membase + UARTDR);
}

-static void lpuart32_console_putchar(struct uart_port *port, int ch)
+static void lpuart32_console_putchar(struct uart_port *port, char ch)
{
lpuart32_wait_bit_set(port, UARTSTAT, UARTSTAT_TDRE);
lpuart32_write(port, ch, UARTDATA);
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index df8a0c8b8b29..8a5e99c54e5c 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1958,7 +1958,7 @@ static const struct uart_ops imx_uart_pops = {
static struct imx_port *imx_uart_ports[UART_NR];

#if IS_ENABLED(CONFIG_SERIAL_IMX_CONSOLE)
-static void imx_uart_console_putchar(struct uart_port *port, int ch)
+static void imx_uart_console_putchar(struct uart_port *port, char ch)
{
struct imx_port *sport = (struct imx_port *)port;

diff --git a/drivers/tty/serial/imx_earlycon.c b/drivers/tty/serial/imx_earlycon.c
index 795606e1a22f..0da84092a063 100644
--- a/drivers/tty/serial/imx_earlycon.c
+++ b/drivers/tty/serial/imx_earlycon.c
@@ -16,7 +16,7 @@
#define UTS_TXFULL (1<<4) /* TxFIFO full */
#define IMX21_UTS 0xb4 /* UART Test Register on all other i.mx*/

-static void imx_uart_console_early_putchar(struct uart_port *port, int ch)
+static void imx_uart_console_early_putchar(struct uart_port *port, char ch)
{
while (readl_relaxed(port->membase + IMX21_UTS) & UTS_TXFULL)
cpu_relax();
diff --git a/drivers/tty/serial/ip22zilog.c b/drivers/tty/serial/ip22zilog.c
index f4dc5fe4ba92..be133ba61774 100644
--- a/drivers/tty/serial/ip22zilog.c
+++ b/drivers/tty/serial/ip22zilog.c
@@ -990,7 +990,7 @@ static struct zilog_layout * __init get_zs(int chip)
#define ZS_PUT_CHAR_MAX_DELAY 2000 /* 10 ms */

#ifdef CONFIG_SERIAL_IP22_ZILOG_CONSOLE
-static void ip22zilog_put_char(struct uart_port *port, int ch)
+static void ip22zilog_put_char(struct uart_port *port, char ch)
{
struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port);
int loops = ZS_PUT_CHAR_MAX_DELAY;
diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c
index 3e324d3f0a6d..a33b73c49813 100644
--- a/drivers/tty/serial/lantiq.c
+++ b/drivers/tty/serial/lantiq.c
@@ -598,7 +598,7 @@ static const struct uart_ops lqasc_pops = {

#ifdef CONFIG_SERIAL_LANTIQ_CONSOLE
static void
-lqasc_console_putchar(struct uart_port *port, int ch)
+lqasc_console_putchar(struct uart_port *port, char ch)
{
int fifofree;

diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c
index 7f74bf7bdcff..76ae24199c7f 100644
--- a/drivers/tty/serial/liteuart.c
+++ b/drivers/tty/serial/liteuart.c
@@ -93,7 +93,7 @@ static void liteuart_timer(struct timer_list *t)
mod_timer(&uart->timer, jiffies + uart_poll_timeout(port));
}

-static void liteuart_putchar(struct uart_port *port, int ch)
+static void liteuart_putchar(struct uart_port *port, char ch)
{
while (litex_read8(port->membase + OFF_TXFULL))
cpu_relax();
diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c
index 07c4161eb4cc..1d09e27f727b 100644
--- a/drivers/tty/serial/lpc32xx_hs.c
+++ b/drivers/tty/serial/lpc32xx_hs.c
@@ -122,7 +122,7 @@ static void wait_for_xmit_ready(struct uart_port *port)
}
}

-static void lpc32xx_hsuart_console_putchar(struct uart_port *port, int ch)
+static void lpc32xx_hsuart_console_putchar(struct uart_port *port, char ch)
{
wait_for_xmit_ready(port);
writel((u32)ch, LPC32XX_HSUART_FIFO(port->membase));
diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index 45e00d928253..ca0aab7bf1d0 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -513,7 +513,7 @@ static void meson_uart_enable_tx_engine(struct uart_port *port)
writel(val, port->membase + AML_UART_CONTROL);
}

-static void meson_console_putchar(struct uart_port *port, int ch)
+static void meson_console_putchar(struct uart_port *port, char ch)
{
if (!port->membase)
return;
diff --git a/drivers/tty/serial/milbeaut_usio.c b/drivers/tty/serial/milbeaut_usio.c
index 8f2cab7f66ad..60f6529a001a 100644
--- a/drivers/tty/serial/milbeaut_usio.c
+++ b/drivers/tty/serial/milbeaut_usio.c
@@ -400,7 +400,7 @@ static const struct uart_ops mlb_usio_ops = {

#ifdef CONFIG_SERIAL_MILBEAUT_USIO_CONSOLE

-static void mlb_usio_console_putchar(struct uart_port *port, int c)
+static void mlb_usio_console_putchar(struct uart_port *port, char c)
{
while (!(readb(port->membase + MLB_USIO_REG_SSR) & MLB_USIO_SSR_TDRE))
cpu_relax();
diff --git a/drivers/tty/serial/mps2-uart.c b/drivers/tty/serial/mps2-uart.c
index 587b42f754cb..8af28a73fb25 100644
--- a/drivers/tty/serial/mps2-uart.c
+++ b/drivers/tty/serial/mps2-uart.c
@@ -432,7 +432,7 @@ static const struct uart_ops mps2_uart_pops = {
static DEFINE_IDR(ports_idr);

#ifdef CONFIG_SERIAL_MPS2_UART_CONSOLE
-static void mps2_uart_console_putchar(struct uart_port *port, int ch)
+static void mps2_uart_console_putchar(struct uart_port *port, char ch)
{
while (mps2_uart_read8(port, UARTn_STATE) & UARTn_STATE_TX_FULL)
cpu_relax();
@@ -484,7 +484,7 @@ static struct console mps2_uart_console = {

#define MPS2_SERIAL_CONSOLE (&mps2_uart_console)

-static void mps2_early_putchar(struct uart_port *port, int ch)
+static void mps2_early_putchar(struct uart_port *port, char ch)
{
while (readb(port->membase + UARTn_STATE) & UARTn_STATE_TX_FULL)
cpu_relax();
diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c
index ab226da75f7b..924af67f73f5 100644
--- a/drivers/tty/serial/mvebu-uart.c
+++ b/drivers/tty/serial/mvebu-uart.c
@@ -598,7 +598,7 @@ static const struct uart_ops mvebu_uart_ops = {

#ifdef CONFIG_SERIAL_MVEBU_CONSOLE
/* Early Console */
-static void mvebu_uart_putc(struct uart_port *port, int c)
+static void mvebu_uart_putc(struct uart_port *port, char c)
{
unsigned int st;

@@ -659,7 +659,7 @@ static void wait_for_xmite(struct uart_port *port)
(val & STAT_TX_EMP), 1, 10000);
}

-static void mvebu_uart_console_putchar(struct uart_port *port, int ch)
+static void mvebu_uart_console_putchar(struct uart_port *port, char ch)
{
wait_for_xmitr(port);
writel(ch, port->membase + UART_TSH(port));
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index ac45f3386e97..29ccaa0031c8 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -1305,7 +1305,7 @@ static const struct uart_ops mxs_auart_ops = {
static struct mxs_auart_port *auart_port[MXS_AUART_PORTS];

#ifdef CONFIG_SERIAL_MXS_AUART_CONSOLE
-static void mxs_auart_console_putchar(struct uart_port *port, int ch)
+static void mxs_auart_console_putchar(struct uart_port *port, char ch)
{
struct mxs_auart_port *s = to_auart_port(port);
unsigned int to = 1000;
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 0862941862c8..464e9b2a4064 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -1194,7 +1194,7 @@ static void omap_serial_early_out(struct uart_port *port, int offset,
writew(value, port->membase + offset);
}

-static void omap_serial_early_putc(struct uart_port *port, int c)
+static void omap_serial_early_putc(struct uart_port *port, char c)
{
unsigned int status;

diff --git a/drivers/tty/serial/owl-uart.c b/drivers/tty/serial/owl-uart.c
index 91f1eb0058d7..60eea8e471d8 100644
--- a/drivers/tty/serial/owl-uart.c
+++ b/drivers/tty/serial/owl-uart.c
@@ -516,7 +516,7 @@ static const struct uart_ops owl_uart_ops = {

#ifdef CONFIG_SERIAL_OWL_CONSOLE

-static void owl_console_putchar(struct uart_port *port, int ch)
+static void owl_console_putchar(struct uart_port *port, char ch)
{
if (!port->membase)
return;
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index f0351e6f0ef6..97b76344288e 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -1600,7 +1600,7 @@ static const struct uart_ops pch_uart_ops = {

#ifdef CONFIG_SERIAL_PCH_UART_CONSOLE

-static void pch_console_putchar(struct uart_port *port, int ch)
+static void pch_console_putchar(struct uart_port *port, char ch)
{
struct eg20t_port *priv =
container_of(port, struct eg20t_port, port);
diff --git a/drivers/tty/serial/pic32_uart.c b/drivers/tty/serial/pic32_uart.c
index 0a12fb11e698..c5dca0a19dbb 100644
--- a/drivers/tty/serial/pic32_uart.c
+++ b/drivers/tty/serial/pic32_uart.c
@@ -691,7 +691,7 @@ static const struct uart_ops pic32_uart_ops = {

#ifdef CONFIG_SERIAL_PIC32_CONSOLE
/* output given char */
-static void pic32_console_putchar(struct uart_port *port, int ch)
+static void pic32_console_putchar(struct uart_port *port, char ch)
{
struct pic32_sport *sport = to_pic32_sport(port);

diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index 5359236b32d6..555f94240098 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -1944,7 +1944,7 @@ static void __exit exit_pmz(void)

#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE

-static void pmz_console_putchar(struct uart_port *port, int ch)
+static void pmz_console_putchar(struct uart_port *port, char ch)
{
struct uart_pmac_port *uap =
container_of(port, struct uart_pmac_port, port);
diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c
index 30b099746a75..c92502abe6fb 100644
--- a/drivers/tty/serial/pxa.c
+++ b/drivers/tty/serial/pxa.c
@@ -619,7 +619,7 @@ static void wait_for_xmitr(struct uart_pxa_port *up)
}
}

-static void serial_pxa_console_putchar(struct uart_port *port, int ch)
+static void serial_pxa_console_putchar(struct uart_port *port, char ch)
{
struct uart_pxa_port *up = (struct uart_pxa_port *)port;

diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index aedc38893e6c..38c2877881a4 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -397,7 +397,7 @@ static void qcom_geni_serial_poll_put_char(struct uart_port *uport,
#endif

#ifdef CONFIG_SERIAL_QCOM_GENI_CONSOLE
-static void qcom_geni_serial_wr_char(struct uart_port *uport, int ch)
+static void qcom_geni_serial_wr_char(struct uart_port *uport, char ch)
{
struct qcom_geni_private_data *private_data = uport->private_data;

diff --git a/drivers/tty/serial/rda-uart.c b/drivers/tty/serial/rda-uart.c
index d550d8fa2fab..95af78d8140b 100644
--- a/drivers/tty/serial/rda-uart.c
+++ b/drivers/tty/serial/rda-uart.c
@@ -573,7 +573,7 @@ static const struct uart_ops rda_uart_ops = {

#ifdef CONFIG_SERIAL_RDA_CONSOLE

-static void rda_console_putchar(struct uart_port *port, int ch)
+static void rda_console_putchar(struct uart_port *port, char ch)
{
if (!port->membase)
return;
diff --git a/drivers/tty/serial/sa1100.c b/drivers/tty/serial/sa1100.c
index 697b6a002a16..bfd37745cc6e 100644
--- a/drivers/tty/serial/sa1100.c
+++ b/drivers/tty/serial/sa1100.c
@@ -695,7 +695,7 @@ void __init sa1100_register_uart(int idx, int port)


#ifdef CONFIG_SERIAL_SA1100_CONSOLE
-static void sa1100_console_putchar(struct uart_port *port, int ch)
+static void sa1100_console_putchar(struct uart_port *port, char ch)
{
struct sa1100_port *sport =
container_of(port, struct sa1100_port, port);
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index d002a4e48ed9..6fef292d6e9c 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -2478,7 +2478,7 @@ static void s3c24xx_serial_put_poll_char(struct uart_port *port,
#endif /* CONFIG_CONSOLE_POLL */

static void
-s3c24xx_serial_console_putchar(struct uart_port *port, int ch)
+s3c24xx_serial_console_putchar(struct uart_port *port, char ch)
{
unsigned int ufcon = rd_regl(port, S3C2410_UFCON);

@@ -2965,7 +2965,7 @@ static void samsung_early_busyuart_fifo(struct uart_port *port)
;
}

-static void samsung_early_putc(struct uart_port *port, int c)
+static void samsung_early_putc(struct uart_port *port, char c)
{
if (readl(port->membase + S3C2410_UFCON) & S3C2410_UFCON_FIFOMODE)
samsung_early_busyuart_fifo(port);
diff --git a/drivers/tty/serial/sb1250-duart.c b/drivers/tty/serial/sb1250-duart.c
index 738df6d9c0d9..bb1913050796 100644
--- a/drivers/tty/serial/sb1250-duart.c
+++ b/drivers/tty/serial/sb1250-duart.c
@@ -820,7 +820,7 @@ static void __init sbd_probe_duarts(void)
* console output. The console_lock is held by the caller, so we
* shouldn't be interrupted for more console activity.
*/
-static void sbd_console_putchar(struct uart_port *uport, int ch)
+static void sbd_console_putchar(struct uart_port *uport, char ch)
{
struct sbd_port *sport = to_sport(uport);

diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c
index 10cc16a71f26..3ee2c942ac22 100644
--- a/drivers/tty/serial/sccnxp.c
+++ b/drivers/tty/serial/sccnxp.c
@@ -828,7 +828,7 @@ static const struct uart_ops sccnxp_ops = {
};

#ifdef CONFIG_SERIAL_SCCNXP_CONSOLE
-static void sccnxp_console_putchar(struct uart_port *port, int c)
+static void sccnxp_console_putchar(struct uart_port *port, char c)
{
int tryes = 100000;

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 1f6df577c75b..33742d86a12e 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -1926,7 +1926,7 @@ static void uart_port_spin_lock_init(struct uart_port *port)
*/
void uart_console_write(struct uart_port *port, const char *s,
unsigned int count,
- void (*putchar)(struct uart_port *, int))
+ void (*putchar)(struct uart_port *, char))
{
unsigned int i;

diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c
index aaca4fe38486..e1003fd280dd 100644
--- a/drivers/tty/serial/serial_txx9.c
+++ b/drivers/tty/serial/serial_txx9.c
@@ -879,7 +879,7 @@ static void __init serial_txx9_register_ports(struct uart_driver *drv,

#ifdef CONFIG_SERIAL_TXX9_CONSOLE

-static void serial_txx9_console_putchar(struct uart_port *port, int ch)
+static void serial_txx9_console_putchar(struct uart_port *port, char ch)
{
struct uart_txx9_port *up = to_uart_txx9_port(port);

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index b610b27893a8..67846605713b 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -2957,7 +2957,7 @@ static void sci_cleanup_single(struct sci_port *port)

#if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) || \
defined(CONFIG_SERIAL_SH_SCI_EARLYCON)
-static void serial_console_putchar(struct uart_port *port, int ch)
+static void serial_console_putchar(struct uart_port *port, char ch)
{
sci_poll_put_char(port, ch);
}
diff --git a/drivers/tty/serial/sifive.c b/drivers/tty/serial/sifive.c
index b79900d0e91a..9f4923bc3afb 100644
--- a/drivers/tty/serial/sifive.c
+++ b/drivers/tty/serial/sifive.c
@@ -756,7 +756,7 @@ static void sifive_serial_poll_put_char(struct uart_port *port,
*/

#ifdef CONFIG_SERIAL_EARLYCON
-static void early_sifive_serial_putc(struct uart_port *port, int c)
+static void early_sifive_serial_putc(struct uart_port *port, char c)
{
while (__ssp_early_readl(port, SIFIVE_SERIAL_TXDATA_OFFS) &
SIFIVE_SERIAL_TXDATA_FULL_MASK)
@@ -800,7 +800,7 @@ OF_EARLYCON_DECLARE(sifive, "sifive,fu540-c000-uart0",

static struct sifive_serial_port *sifive_serial_console_ports[SIFIVE_SERIAL_MAX_PORTS];

-static void sifive_serial_console_putchar(struct uart_port *port, int ch)
+static void sifive_serial_console_putchar(struct uart_port *port, char ch)
{
struct sifive_serial_port *ssp = port_to_sifive_serial_port(port);

diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c
index 9a7ae6384edf..45cebfed0378 100644
--- a/drivers/tty/serial/sprd_serial.c
+++ b/drivers/tty/serial/sprd_serial.c
@@ -1058,7 +1058,7 @@ console_initcall(sprd_serial_console_init);
#define SPRD_CONSOLE (&sprd_console)

/* Support for earlycon */
-static void sprd_putc(struct uart_port *port, int c)
+static void sprd_putc(struct uart_port *port, char c)
{
unsigned int timeout = SPRD_TIMEOUT;

diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c
index 87e480cc8206..6418a7f4fdde 100644
--- a/drivers/tty/serial/st-asc.c
+++ b/drivers/tty/serial/st-asc.c
@@ -854,7 +854,7 @@ static int asc_serial_resume(struct device *dev)
/*----------------------------------------------------------------------*/

#ifdef CONFIG_SERIAL_ST_ASC_CONSOLE
-static void asc_console_putchar(struct uart_port *port, int ch)
+static void asc_console_putchar(struct uart_port *port, char ch)
{
unsigned int timeout = 1000000;

diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index 1f89ab0e49ac..7c7aace2418f 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -1629,7 +1629,7 @@ static int stm32_usart_serial_remove(struct platform_device *pdev)
}

#ifdef CONFIG_SERIAL_STM32_CONSOLE
-static void stm32_usart_console_putchar(struct uart_port *port, int ch)
+static void stm32_usart_console_putchar(struct uart_port *port, char ch)
{
struct stm32_port *stm32_port = to_stm32_port(port);
const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c
index 98b2f4fb9a99..029a98ead88c 100644
--- a/drivers/tty/serial/sunsu.c
+++ b/drivers/tty/serial/sunsu.c
@@ -1281,7 +1281,7 @@ static void wait_for_xmitr(struct uart_sunsu_port *up)
}
}

-static void sunsu_console_putchar(struct uart_port *port, int ch)
+static void sunsu_console_putchar(struct uart_port *port, char ch)
{
struct uart_sunsu_port *up =
container_of(port, struct uart_sunsu_port, port);
diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c
index b714b00d2dad..d070e42f1c37 100644
--- a/drivers/tty/serial/sunzilog.c
+++ b/drivers/tty/serial/sunzilog.c
@@ -100,7 +100,7 @@ struct uart_sunzilog_port {
#endif
};

-static void sunzilog_putchar(struct uart_port *port, int ch);
+static void sunzilog_putchar(struct uart_port *port, char ch);

#define ZILOG_CHANNEL_FROM_PORT(PORT) ((struct zilog_channel __iomem *)((PORT)->membase))
#define UART_ZILOG(PORT) ((struct uart_sunzilog_port *)(PORT))
@@ -1125,7 +1125,7 @@ static void sunzilog_free_tables(void)

#define ZS_PUT_CHAR_MAX_DELAY 2000 /* 10 ms */

-static void __maybe_unused sunzilog_putchar(struct uart_port *port, int ch)
+static void __maybe_unused sunzilog_putchar(struct uart_port *port, char ch)
{
struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port);
int loops = ZS_PUT_CHAR_MAX_DELAY;
diff --git a/drivers/tty/serial/uartlite.c b/drivers/tty/serial/uartlite.c
index e1fa52d31474..f1b342c1e2fb 100644
--- a/drivers/tty/serial/uartlite.c
+++ b/drivers/tty/serial/uartlite.c
@@ -482,7 +482,7 @@ static void ulite_console_wait_tx(struct uart_port *port)
"timeout waiting for TX buffer empty\n");
}

-static void ulite_console_putchar(struct uart_port *port, int ch)
+static void ulite_console_putchar(struct uart_port *port, char ch)
{
ulite_console_wait_tx(port);
uart_out32(ch, ULITE_TX, port);
@@ -558,7 +558,7 @@ static struct console ulite_console = {
.data = &ulite_uart_driver,
};

-static void early_uartlite_putc(struct uart_port *port, int c)
+static void early_uartlite_putc(struct uart_port *port, char c)
{
/*
* Limit how many times we'll spin waiting for TX FIFO status.
diff --git a/drivers/tty/serial/vr41xx_siu.c b/drivers/tty/serial/vr41xx_siu.c
index 647198b1e2b9..8029d2d8e6fb 100644
--- a/drivers/tty/serial/vr41xx_siu.c
+++ b/drivers/tty/serial/vr41xx_siu.c
@@ -743,7 +743,7 @@ static void wait_for_xmitr(struct uart_port *port)
}
}

-static void siu_console_putchar(struct uart_port *port, int ch)
+static void siu_console_putchar(struct uart_port *port, char ch)
{
wait_for_xmitr(port);
siu_write(port, UART_TX, ch);
diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c
index 9adfe3dc970f..375a6959439d 100644
--- a/drivers/tty/serial/vt8500_serial.c
+++ b/drivers/tty/serial/vt8500_serial.c
@@ -484,7 +484,7 @@ static void wait_for_xmitr(struct uart_port *port)
} while (status & 0x10);
}

-static void vt8500_console_putchar(struct uart_port *port, int c)
+static void vt8500_console_putchar(struct uart_port *port, char c)
{
wait_for_xmitr(port);
writeb(c, port->membase + VT8500_TXFIFO);
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index d5e243908d9f..bdcd7dd743ef 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -1142,7 +1142,7 @@ static struct uart_driver cdns_uart_uart_driver;
* @port: Handle to the uart port structure
* @ch: Character to be written
*/
-static void cdns_uart_console_putchar(struct uart_port *port, int ch)
+static void cdns_uart_console_putchar(struct uart_port *port, char ch)
{
while (readl(port->membase + CDNS_UART_SR) & CDNS_UART_SR_TXFULL)
cpu_relax();
diff --git a/drivers/tty/serial/zs.c b/drivers/tty/serial/zs.c
index 4b4f604646a7..d63aa07653ca 100644
--- a/drivers/tty/serial/zs.c
+++ b/drivers/tty/serial/zs.c
@@ -1124,7 +1124,7 @@ static int __init zs_probe_sccs(void)


#ifdef CONFIG_SERIAL_ZS_CONSOLE
-static void zs_console_putchar(struct uart_port *uport, int ch)
+static void zs_console_putchar(struct uart_port *uport, char ch)
{
struct zs_port *zport = to_zport(uport);
struct zs_scc *scc = zport->scc;
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index c58cc142d23f..68e62703eaa6 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -399,7 +399,7 @@ int uart_set_options(struct uart_port *port, struct console *co, int baud,
struct tty_driver *uart_console_device(struct console *co, int *index);
void uart_console_write(struct uart_port *port, const char *s,
unsigned int count,
- void (*putchar)(struct uart_port *, int));
+ void (*putchar)(struct uart_port *, char));

/*
* Port/driver registration/removal
--
2.34.1