Add header file macro definition.

Signed-off-by: Li zeming <zeming@nfschina.com>
---
 drivers/acpi/sleep.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/acpi/sleep.h b/drivers/acpi/sleep.h
index 7fe41ee489d6..adb3b5c13f90 100644
--- a/drivers/acpi/sleep.h
+++ b/drivers/acpi/sleep.h
@@ -1,4 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _SLEEP_H
+#define _SLEEP_H
 
 extern void acpi_enable_wakeup_devices(u8 sleep_state);
 extern void acpi_disable_wakeup_devices(u8 sleep_state);
@@ -30,3 +32,5 @@ extern bool acpi_sleep_default_s3;
 #else
 #define acpi_sleep_default_s3	(1)
 #endif
+
+#endif
-- 
2.18.2

On Wed, Jul 6, 2022 at 3:44 AM Li zeming <zeming@nfschina.com> wrote:
>
> Add header file macro definition.

Please explain why you want to make this change.

> Signed-off-by: Li zeming <zeming@nfschina.com>
> ---
>  drivers/acpi/sleep.h | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/drivers/acpi/sleep.h b/drivers/acpi/sleep.h
> index 7fe41ee489d6..adb3b5c13f90 100644
> --- a/drivers/acpi/sleep.h
> +++ b/drivers/acpi/sleep.h
> @@ -1,4 +1,6 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef _SLEEP_H
> +#define _SLEEP_H
>
>  extern void acpi_enable_wakeup_devices(u8 sleep_state);
>  extern void acpi_disable_wakeup_devices(u8 sleep_state);
> @@ -30,3 +32,5 @@ extern bool acpi_sleep_default_s3;
>  #else
>  #define acpi_sleep_default_s3  (1)
>  #endif
> +
> +#endif
> --
> 2.18.2
>

I think the header file could avoid redefinition errors.
 at compile time by adding macro definitions.