From 2c004a548955d4d790f134f2809c0e3a1457f12c Mon Sep 17 00:00:00 2001
From: jewelcodes <omarmelghoul01@gmail.com>
Date: Tue, 8 Oct 2024 16:30:05 -0400
Subject: [PATCH] x86_64: avoid locking bus when unnecessary

---
 src/platform/x86_64/lock.asm | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/platform/x86_64/lock.asm b/src/platform/x86_64/lock.asm
index bca6f6b2..9186055b 100644
--- a/src/platform/x86_64/lock.asm
+++ b/src/platform/x86_64/lock.asm
@@ -72,6 +72,15 @@ acquireLockBlocking:
 global releaseLock
 align 16
 releaseLock:
+    pushfq
+    cli
+
     xor rax, rax
+    test dword [rdi], 1
+    jz .done
+
     mov [rdi], eax
+
+.done:
+    popfq
     ret