On Thu, Aug 31, 2023 at 9:35 AM Su Hui <suhui@xxxxxxxxxxxx> wrote:
>
> With gcc and W=1 option to compile kernel, warning happends:
>
> drivers/acpi/osl.c:156:2: error:
> function ‘acpi_os_vprintf’ might be a candidate for ‘gnu_printf’
> format attribute [-Werror=suggest-attribute=format].
>
> Allow the compiler to recognize and check format strings is safer.
>
> Signed-off-by: Su Hui <suhui@xxxxxxxxxxxx>
> ---
> drivers/acpi/osl.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
> index f725813d0cce..357f1325485d 100644
> --- a/drivers/acpi/osl.c
> +++ b/drivers/acpi/osl.c
> @@ -149,7 +149,7 @@ void acpi_os_printf(const char *fmt, ...)
> }
> EXPORT_SYMBOL(acpi_os_printf);
>
> -void acpi_os_vprintf(const char *fmt, va_list args)
> +void __printf(1, 0) acpi_os_vprintf(const char *fmt, va_list args)
> {
> static char buffer[512];
>
> --
Applied (with some subject and changelog edits) as 6.7 material, thanks!
