From c7673dc4385f8cf6e74ea39346a1e6efad7a1832 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Gr=C3=A9goire?= <loic@gregoire.dev>
Date: Sat, 26 Sep 2026 13:11:20 -0400
Subject: [PATCH] ke: fix shootdown bugs

---
 src/kern/shootdown.zig | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/kern/shootdown.zig b/src/kern/shootdown.zig
index 758d90c..3a247e4 100644
--- a/src/kern/shootdown.zig
+++ b/src/kern/shootdown.zig
@@ -61,6 +61,8 @@ fn pcpu_init() linksection(r.init) void {
         .payload = undefined,
         .link = undefined,
     });
+
+    local.npages = .init(0);
 }
 
 comptime {
@@ -189,6 +191,10 @@ pub fn submit(state: ShootdownState, target_mask: ke.CpuMask) !void {
     // Flush on our local TLB.
     flush_range(state.base, state.npages);
 
+    if (target_mask.is_all(false)) {
+        return;
+    }
+
     // Get a slot and fill it.
     const curcpu = ke.cpu.current();
     const cpu = percpu.local();