kernel: exit: Panic if core is not preemptable

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/sys/arch/amd64/amd64/proc_machdep.c b/sys/arch/amd64/amd64/proc_machdep.c
index 11b1901..82b4e4f 100644
--- a/sys/arch/amd64/amd64/proc_machdep.c
+++ b/sys/arch/amd64/amd64/proc_machdep.c
@@ -281,6 +281,18 @@ sched_preempt_set(bool enable)
     ci->preempt = enable;
 }
 
+bool
+sched_preemptable(void)
+{
+    struct cpu_info *ci = this_cpu();
+
+    if (ci == NULL) {
+        return false;
+    }
+
+    return ci->preempt;
+}
+
 /*
  * Perform a context switch.
  */