[PATCH] acpi/sbshc: Add header file macro definition

[Li zeming]

Add header file macro definition.

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

diff --git a/drivers/acpi/sbshc.h b/drivers/acpi/sbshc.h
index 695c390e2884..22b11a1655d2 100644
--- a/drivers/acpi/sbshc.h
+++ b/drivers/acpi/sbshc.h
@@ -1,4 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _SBSHC_H
+#define _SBSHC_H
+
 struct acpi_smb_hc;
 enum acpi_smb_protocol {
 	SMBUS_WRITE_QUICK = 2,
@@ -30,3 +33,4 @@ extern int acpi_smbus_write(struct acpi_smb_hc *hc, u8 protocol, u8 slave_addres
 extern int acpi_smbus_register_callback(struct acpi_smb_hc *hc,
 		smbus_alarm_callback callback, void *context);
 extern int acpi_smbus_unregister_callback(struct acpi_smb_hc *hc);
+#endif
-- 
2.18.2