From: "Ankur Arora" <ankur.a.arora@oracle.com>
To: devel@edk2.groups.io
Cc: Ankur Arora <ankur.a.arora@oracle.com>,
Liming Gao <gaoliming@byosoft.com.cn>,
Michael D Kinney <michael.d.kinney@intel.com>
Subject: [PATCH] MdePkg: use CpuPause() in CpuDeadLoop()
Date: Tue, 16 Mar 2021 15:59:18 -0700 [thread overview]
Message-ID: <20210316225918.2625938-1-ankur.a.arora@oracle.com> (raw)
Use CpuPause() to allow the CPU to go into a lower power state
state while we spin wait.
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
---
MdePkg/Library/BaseLib/CpuDeadLoop.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/MdePkg/Library/BaseLib/CpuDeadLoop.c b/MdePkg/Library/BaseLib/CpuDeadLoop.c
index 9e110cacbc96..3cd304351a65 100644
--- a/MdePkg/Library/BaseLib/CpuDeadLoop.c
+++ b/MdePkg/Library/BaseLib/CpuDeadLoop.c
@@ -28,5 +28,7 @@ CpuDeadLoop (
{
volatile UINTN Index;
- for (Index = 0; Index == 0;);
+ for (Index = 0; Index == 0;) {
+ CpuPause();
+ }
}
--
2.9.3
next reply other threads:[~2021-03-16 22:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-16 22:59 Ankur Arora [this message]
2021-03-17 1:08 ` 回复: [PATCH] MdePkg: use CpuPause() in CpuDeadLoop() gaoliming
2021-03-17 3:54 ` Ankur Arora
2021-03-17 18:30 ` [edk2-devel] " Laszlo Ersek
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