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serial: stm32: Fix unused-variable warning

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If CONFIG_SERIAL_EARLYCON and CONFIG_OF are both not set,
gcc warns about unused variable:

drivers/tty/serial/stm32-usart.c:83:32: error: ‘stm32h7_info’ defined but not used [-Werror=unused-variable]
 static struct stm32_usart_info stm32h7_info = {
                                ^~~~~~~~~~~~
drivers/tty/serial/stm32-usart.c:61:32: error: ‘stm32f7_info’ defined but not used [-Werror=unused-variable]
 static struct stm32_usart_info stm32f7_info = {
                                ^~~~~~~~~~~~
drivers/tty/serial/stm32-usart.c:40:32: error: ‘stm32f4_info’ defined but not used [-Werror=unused-variable]
 static struct stm32_usart_info stm32f4_info = {
                                ^~~~~~~~~~~~
cc1: all warnings being treated as errors

Mark these variables as __maybe_unused  to fix this.

Fixes: c7039ce904 ("serial: stm32: make info structs static to avoid sparse warnings")
Signed-off-by: Ren Zhijie <renzhijie2@huawei.com>
Link: https://lore.kernel.org/r/20220926025826.44145-1-renzhijie2@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ren Zhijie 2022-09-26 02:58:26 +00:00 committed by Greg Kroah-Hartman
parent 468cdabe93
commit dfdabd3856
1 changed files with 3 additions and 3 deletions
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6
drivers/tty/serial/stm32-usart.c
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@ -37,7 +37,7 @@
/* Register offsets */
static struct stm32_usart_info stm32f4_info = {
static struct stm32_usart_info __maybe_unused stm32f4_info = {
.ofs = {
.isr = 0x00,
.rdr = 0x04,
@ -58,7 +58,7 @@ static struct stm32_usart_info stm32f4_info = {
}
};
static struct stm32_usart_info stm32f7_info = {
static struct stm32_usart_info __maybe_unused stm32f7_info = {
.ofs = {
.cr1 = 0x00,
.cr2 = 0x04,
@ -80,7 +80,7 @@ static struct stm32_usart_info stm32f7_info = {
}
};
static struct stm32_usart_info stm32h7_info = {
static struct stm32_usart_info __maybe_unused stm32h7_info = {
.ofs = {
.cr1 = 0x00,
.cr2 = 0x04,