From 9ce60df67bb75468368e049c5f2c3195e3d669c0 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Sat, 17 May 2025 18:37:19 -0400
Subject: kernel: sched: Add sched_detach()

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/include/sys/sched.h |  2 ++
 sys/kern/kern_sched.c   | 12 ++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/sys/include/sys/sched.h b/sys/include/sys/sched.h
index 7f5e65f..80f4d1c 100644
--- a/sys/include/sys/sched.h
+++ b/sys/include/sys/sched.h
@@ -37,6 +37,8 @@
 
 void sched_init(void);
 void sched_yield(void);
+void sched_detach(struct proc *td);
+
 __dead void sched_enter(void);
 void sched_enqueue_td(struct proc *td);
 
diff --git a/sys/kern/kern_sched.c b/sys/kern/kern_sched.c
index 01c3b8d..8e5c0e9 100644
--- a/sys/kern/kern_sched.c
+++ b/sys/kern/kern_sched.c
@@ -261,6 +261,18 @@ sched_yield(void)
     }
 }
 
+void
+sched_detach(struct proc *td)
+{
+    struct sched_queue *queue;
+
+    spinlock_acquire(&tdq_lock);
+    queue = &qlist[td->priority];
+
+    TAILQ_REMOVE(&queue->q, td, link);
+    spinlock_release(&tdq_lock);
+}
+
 void
 sched_init(void)
 {
-- 
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