From b0025dc0cda5acf6a4b061a3b31f32798c664e5f Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Mon, 9 Jun 2025 16:03:57 -0400
Subject: kernel: proc: Make per-process flags volatile

The per process flags field is a frequently modified/read field and MUST
NOT give stale data. Be very sure that the compiler does not optimize
away accesses.

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/include/sys/proc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'sys')

diff --git a/sys/include/sys/proc.h b/sys/include/sys/proc.h
index 25f5fd3..2f1470a 100644
--- a/sys/include/sys/proc.h
+++ b/sys/include/sys/proc.h
@@ -68,7 +68,7 @@ struct proc {
     size_t priority;
     int exit_status;
     bool rested;
-    uint32_t flags;
+    volatile uint32_t flags;
     uint32_t nleaves;
     uintptr_t stack_base;
     struct spinlock ksigq_lock;
-- 
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