ANDROID: GKI: sched: add Android ABI padding to some structures

Try to mitigate potential future driver core api changes by adding a
padding to struct user_struct and struct sched_domain.

Based on a change made to the RHEL/CENTOS 8 kernel.

Bug: 151154716
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ie8f685122767b690a116193aefd8c5e3b6ef8f17

include/linux/sched/topology.h

@@ -3,6 +3,7 @@
 #define _LINUX_SCHED_TOPOLOGY_H
 
 #include <linux/topology.h>
+#include <linux/android_kabi.h>
 
 #include <linux/sched/idle.h>
 
@@ -143,6 +144,10 @@ struct sched_domain {
 	struct sched_domain_shared *shared;
 
 	unsigned int span_weight;
+
+	ANDROID_KABI_RESERVE(1);
+	ANDROID_KABI_RESERVE(2);
+
 	/*
 	 * Span of all CPUs in this domain.
 	 *

include/linux/sched/user.h

@@ -6,6 +6,7 @@
 #include <linux/atomic.h>
 #include <linux/refcount.h>
 #include <linux/ratelimit.h>
+#include <linux/android_kabi.h>
 
 struct key;
 
@@ -46,6 +47,9 @@ struct user_struct {
 
 	/* Miscellaneous per-user rate limit */
 	struct ratelimit_state ratelimit;
+
+	ANDROID_KABI_RESERVE(1);
+	ANDROID_KABI_RESERVE(2);
 };
 
 extern int uids_sysfs_init(void);