From: 徐志强 <shore.cloud@gmail.com>
Date: Wed, 11 Dec 2019 05:51:33 +0000 (+0000)
Subject: runtime: call osyield directly in lockextra
X-Git-Tag: go1.15beta1~208
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=85162292af601a1bebb8ec3d63314e39b648829f;p=gostls13.git

runtime: call osyield directly in lockextra

The `yield := osyield` line doesn't serve any purpose,  it's committed in `2015`, time to delete that line:)

Change-Id: I382d4d32cf320f054f011f3b6684c868cbcb0ff2
GitHub-Last-Rev: 7a0aa25e555edd901add25a1101e7b145d1f3bd8
GitHub-Pull-Request: golang/go#36078
Reviewed-on: https://go-review.googlesource.com/c/go/+/210837
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
---

diff --git a/src/runtime/proc.go b/src/runtime/proc.go
index bd114496b2..fe7da0bc87 100644
--- a/src/runtime/proc.go
+++ b/src/runtime/proc.go
@@ -1691,8 +1691,7 @@ func lockextra(nilokay bool) *m {
 	for {
 		old := atomic.Loaduintptr(&extram)
 		if old == locked {
-			yield := osyield
-			yield()
+			osyield()
 			continue
 		}
 		if old == 0 && !nilokay {
@@ -1709,8 +1708,7 @@ func lockextra(nilokay bool) *m {
 		if atomic.Casuintptr(&extram, old, locked) {
 			return (*m)(unsafe.Pointer(old))
 		}
-		yield := osyield
-		yield()
+		osyield()
 		continue
 	}
 }