From a0e2fa79b38f6bdec0baf61850bb0a9410c07fe7 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Wed, 17 Sep 2025 01:05:36 -0400
Subject: kern/amd64: mp: Use zero-based index in corelist

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 src/sys/arch/amd64/cpu/cpu_mp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/sys/arch/amd64/cpu/cpu_mp.c')

diff --git a/src/sys/arch/amd64/cpu/cpu_mp.c b/src/sys/arch/amd64/cpu/cpu_mp.c
index 293e449..8d84b1f 100644
--- a/src/sys/arch/amd64/cpu/cpu_mp.c
+++ b/src/sys/arch/amd64/cpu/cpu_mp.c
@@ -31,6 +31,7 @@
 #include <sys/param.h>
 #include <sys/syslog.h>
 #include <sys/panic.h>
+#include <sys/atomic.h>
 #include <sys/cpuvar.h>
 #include <sys/limits.h>
 #include <os/kalloc.h>
@@ -72,7 +73,8 @@ ap_entry(struct limine_smp_info *)
     cpu_conf(pcore);
     cpu_init(pcore);
 
-    corelist[ncores_up++] = pcore;
+    corelist[ncores_up - 1] = pcore;
+    atomic_inc_64(&ncores_up);
     spinlock_release(&lock);
     for (;;);
 }
-- 
cgit v1.2.3