[PATCH] device_cgroup: add include guard to device_cgroup.h

[Masahiro Yamada]

Add a header include guard just in case.

Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
---

 include/linux/device_cgroup.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/device_cgroup.h b/include/linux/device_cgroup.h
index 8557efe096dc..7c1d832d29a6 100644
--- a/include/linux/device_cgroup.h
+++ b/include/linux/device_cgroup.h
@@ -1,4 +1,8 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _LINUX_DEVICE_CGROUP_H
+#define _LINUX_DEVICE_CGROUP_H
+
 #include <linux/fs.h>
 #include <linux/bpf-cgroup.h>
 
@@ -77,3 +81,5 @@ static inline int devcgroup_inode_permission(struct inode *inode, int mask)
 static inline int devcgroup_inode_mknod(int mode, dev_t dev)
 { return 0; }
 #endif
+
+#endif /* _LINUX_DEVICE_CGROUP_H */
-- 
2.17.1