From 4d423137ba180d252088c3925587057abd02d084 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Tue, 27 May 2025 01:38:26 -0400
Subject: kernel: sched: Don't switch on PID 0

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/kern/kern_sched.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/kern/kern_sched.c b/sys/kern/kern_sched.c
index 756b44b..2fe0f32 100644
--- a/sys/kern/kern_sched.c
+++ b/sys/kern/kern_sched.c
@@ -190,6 +190,9 @@ sched_switch(struct trapframe *tf)
     td = ci->curtd;
 
     if (td != NULL) {
+        if (td->pid == 0)
+            return;
+
         dispatch_signals(td);
         td_pri_update(td);
         sched_save_td(td, tf);
-- 
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