timerqueue: Split out timerqueue_types.h

Trimming down sched.h dependencies: timerqueue_types can include just
rbtree_types.h instead of pulling in rbtree.h.

Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Author: Kent Overstreet

include/linux/hrtimer_types.h

@@ -3,7 +3,7 @@
 #define _LINUX_HRTIMER_TYPES_H
 
 #include <linux/types.h>
-#include <linux/timerqueue.h>
+#include <linux/timerqueue_types.h>
 
 struct hrtimer_clock_base;
 

include/linux/posix-timers_types.h

@@ -3,7 +3,7 @@
 #define _linux_POSIX_TIMERS_TYPES_H
 
 #include <linux/mutex_types.h>
-#include <linux/timerqueue.h>
+#include <linux/timerqueue_types.h>
 #include <linux/types.h>
 
 /*

include/linux/timerqueue.h

@@ -3,18 +3,7 @@
 #define _LINUX_TIMERQUEUE_H
 
 #include <linux/rbtree.h>
-#include <linux/ktime.h>
-
-
-struct timerqueue_node {
-	struct rb_node node;
-	ktime_t expires;
-};
-
-struct timerqueue_head {
-	struct rb_root_cached rb_root;
-};
-
+#include <linux/timerqueue_types.h>
 
 extern bool timerqueue_add(struct timerqueue_head *head,
 			   struct timerqueue_node *node);

include/linux/timerqueue_types.h

@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_TIMERQUEUE_TYPES_H
+#define _LINUX_TIMERQUEUE_TYPES_H
+
+#include <linux/rbtree_types.h>
+#include <linux/types.h>
+
+struct timerqueue_node {
+	struct rb_node node;
+	ktime_t expires;
+};
+
+struct timerqueue_head {
+	struct rb_root_cached rb_root;
+};
+
+#endif /* _LINUX_TIMERQUEUE_TYPES_H */