Fix the following coccicheck warning:

drivers/acpi/acpica/exserial.c:346: WARNING opportunity for min().

min() macro is defined in include/linux/minmax.h. It avoids
multiple evaluations of the arguments when non-constant and performs
strict type-checking.

Signed-off-by: Jiangshan Yi <yijiangshan@kylinos.cn>
---
 drivers/acpi/acpica/exserial.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/acpi/acpica/exserial.c b/drivers/acpi/acpica/exserial.c
index fd63f2042514..dfe507e0a09a 100644
--- a/drivers/acpi/acpica/exserial.c
+++ b/drivers/acpi/acpica/exserial.c
@@ -343,8 +343,7 @@ acpi_ex_write_serial_bus(union acpi_operand_object *source_desc,
 	/* Copy the input buffer data to the transfer buffer */
 
 	buffer = buffer_desc->buffer.pointer;
-	data_length = (buffer_length < source_desc->buffer.length ?
-		       buffer_length : source_desc->buffer.length);
+	data_length = min(buffer_length, source_desc->buffer.length);
 	memcpy(buffer, source_desc->buffer.pointer, data_length);
 
 	/* Lock entire transaction if requested */
-- 
2.27.0

On Tue, Mar 28, 2023 at 3:52 AM Jiangshan Yi <yijiangshan@kylinos.cn> wrote:
>
> Fix the following coccicheck warning:
>
> drivers/acpi/acpica/exserial.c:346: WARNING opportunity for min().
>
> min() macro is defined in include/linux/minmax.h. It avoids
> multiple evaluations of the arguments when non-constant and performs
> strict type-checking.
>
> Signed-off-by: Jiangshan Yi <yijiangshan@kylinos.cn>

ACPICA changes need to be submitted as pull requests to the upstream
project on GitHub.  When that happens, a Linux patch based on an
upstream ACPICA PR can be submitted with a Link: tag pointing to that
PR.

Thanks!

> ---
>  drivers/acpi/acpica/exserial.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/acpi/acpica/exserial.c b/drivers/acpi/acpica/exserial.c
> index fd63f2042514..dfe507e0a09a 100644
> --- a/drivers/acpi/acpica/exserial.c
> +++ b/drivers/acpi/acpica/exserial.c
> @@ -343,8 +343,7 @@ acpi_ex_write_serial_bus(union acpi_operand_object *source_desc,
>         /* Copy the input buffer data to the transfer buffer */
>
>         buffer = buffer_desc->buffer.pointer;
> -       data_length = (buffer_length < source_desc->buffer.length ?
> -                      buffer_length : source_desc->buffer.length);
> +       data_length = min(buffer_length, source_desc->buffer.length);
>         memcpy(buffer, source_desc->buffer.pointer, data_length);
>
>         /* Lock entire transaction if requested */
> --
> 2.27.0
>