From 6a3146aad9dac360a4718abcf3f94737540a00b2 Mon Sep 17 00:00:00 2001
From: Augustin Cavalier <waddlesplash@gmail.com>
Date: Sat, 30 Aug 2025 11:27:36 -0400
Subject: [PATCH] kernel/timer: Slightly optimize spin().

Move the math operation out of the loop.
---
 src/system/kernel/timer.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/system/kernel/timer.cpp b/src/system/kernel/timer.cpp
index 83865c2a71..08ca9f613b 100644
--- a/src/system/kernel/timer.cpp
+++ b/src/system/kernel/timer.cpp
@@ -446,8 +446,8 @@ cancel_timer(timer* event)
 void
 spin(bigtime_t microseconds)
 {
-	bigtime_t time = system_time();
+	bigtime_t target = system_time() + microseconds;
 
-	while ((system_time() - time) < microseconds)
+	while (system_time() < target)
 		cpu_pause();
 }