From 316e1f2d3d16191bc261f893ddb32c5f04f7b9a8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Gr=C3=A9goire?= <loic@gregoire.dev>
Date: Sun, 5 Apr 2026 22:55:51 -0400
Subject: [PATCH] fix(mm/phys): use wrapping addition

---
 src/mm/phys.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mm/phys.zig b/src/mm/phys.zig
index cbbdc7c..346b27c 100644
--- a/src/mm/phys.zig
+++ b/src/mm/phys.zig
@@ -58,7 +58,7 @@ fn push_to_pool(batch: *mm.Page) void {
 
         const new_head = GlobalHead{
             .pfn = mm.struct_page_to_pfn(batch),
-            .tag = old_head.tag + 1,
+            .tag = old_head.tag +% 1,
         };
 
         old_head = batch_pool.cmpxchgWeak(old_head, new_head, .acq_rel, .acquire) orelse break;