[tip: sched/core] psi: Add a missing SPDX license header

[tip-bot2 for Liu Xinpeng]

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     2fb75e1b642f49253d8848c9e47e8942f5366221
Gitweb:        https://git.kernel.org/tip/2fb75e1b642f49253d8848c9e47e8942f5366221
Author:        Liu Xinpeng <liuxp11@xxxxxxxxxxxxxxx>
AuthorDate:    Mon, 25 Oct 2021 11:46:26 +08:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Wed, 17 Nov 2021 14:48:59 +01:00

psi: Add a missing SPDX license header

Add the missing SPDX license header to
include/linux/psi.h
include/linux/psi_types.h
kernel/sched/psi.c

Signed-off-by: Liu Xinpeng <liuxp11@xxxxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/1635133586-84611-2-git-send-email-liuxp11@xxxxxxxxxxxxxxx
---
 include/linux/psi.h       | 1 +
 include/linux/psi_types.h | 1 +
 kernel/sched/psi.c        | 1 +
 3 files changed, 3 insertions(+)

diff --git a/include/linux/psi.h b/include/linux/psi.h
index 65eb147..a70ca83 100644
--- a/include/linux/psi.h
+++ b/include/linux/psi.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _LINUX_PSI_H
 #define _LINUX_PSI_H
 
diff --git a/include/linux/psi_types.h b/include/linux/psi_types.h
index 0a23300..bf50068 100644
--- a/include/linux/psi_types.h
+++ b/include/linux/psi_types.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _LINUX_PSI_TYPES_H
 #define _LINUX_PSI_TYPES_H
 
diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c
index 526af84..3397fa0 100644
--- a/kernel/sched/psi.c
+++ b/kernel/sched/psi.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Pressure stall information for CPU, memory and IO
  *