From bd42d3870f6a1bf8cabf93fb3f3d4a25910307bd Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Thu, 20 Nov 2025 18:47:59 -0500
Subject: kern/amd64+sys: Add cacheline alignment macro

Cacheline alignment is a mitigation against false sharing imposed
by locality of a shared resource.

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/arch/amd64/conf/link.ld | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'sys/arch')

diff --git a/sys/arch/amd64/conf/link.ld b/sys/arch/amd64/conf/link.ld
index 9ae1a01..5b42aeb 100644
--- a/sys/arch/amd64/conf/link.ld
+++ b/sys/arch/amd64/conf/link.ld
@@ -33,6 +33,10 @@ SECTIONS
         *(.data)
     } :data
 
+    .cacheline_aligned : ALIGN(64) {
+        *(.cacheline_aligned)
+    }
+
     .bss : {
         *(COMMON)
         *(.bss .bss.*)
-- 
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