From: Jeff Fan <jeff.fan@intel.com>
Date: Tue, 12 Jul 2016 03:10:27 +0000 (+0800)
Subject: MdePkg/BaseSynchronizationLib: spin lock alignment is 32 at least
X-Git-Tag: edk2-stable201903~6313
X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=52f5bd2669916c54845eda8829b2f129b6088896

MdePkg/BaseSynchronizationLib: spin lock alignment is 32 at least

Some processor may return small cache line size, we should return 32 bytes at
least for spin lock alignment.

Cc: Liming Gao <liming.gao@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
---

diff --git a/MdePkg/Library/BaseSynchronizationLib/Ia32/InternalGetSpinLockProperties.c b/MdePkg/Library/BaseSynchronizationLib/Ia32/InternalGetSpinLockProperties.c
index 49f05fb18a..60f5c7f36b 100644
--- a/MdePkg/Library/BaseSynchronizationLib/Ia32/InternalGetSpinLockProperties.c
+++ b/MdePkg/Library/BaseSynchronizationLib/Ia32/InternalGetSpinLockProperties.c
@@ -55,6 +55,10 @@ InternalGetSpinLockProperties (
     }
   }
 
+  if (CacheLineSize < 32) {
+    CacheLineSize = 32;
+  }
+
   return CacheLineSize;
 }