From 6787b9d73030ee9950d2d3bf975da490e4d22fe2 Mon Sep 17 00:00:00 2001
From: zhangbitao <zhangbitao01@gmail.com>
Date: Thu, 29 Oct 2020 09:49:32 +0800
Subject: [PATCH] Fix deadlock in MemFS.SetIgnoreSyncs.

---
 vfs/mem_fs.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vfs/mem_fs.go b/vfs/mem_fs.go
index bcd799b8c43..62c8e208649 100644
--- a/vfs/mem_fs.go
+++ b/vfs/mem_fs.go
@@ -99,11 +99,11 @@ func (y *MemFS) String() string {
 // SetIgnoreSyncs sets the MemFS.ignoreSyncs field. See the usage comment with NewStrictMem() for
 // details.
 func (y *MemFS) SetIgnoreSyncs(ignoreSyncs bool) {
-	y.mu.Lock()
 	if !y.strict {
 		// noop
 		return
 	}
+	y.mu.Lock()
 	y.ignoreSyncs = ignoreSyncs
 	y.mu.Unlock()
 }