syncs: start working on mutex debugging, registrationbradfitz/mutex_debug

Updates #17852

Change-Id: Ib1b634eedd30cc4006bc1b39aa8d479d37c5f1f2
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/util/goroutines/tracker.go b/util/goroutines/tracker.go
index c2a0cb8c3..044843d33 100644
--- a/util/goroutines/tracker.go
+++ b/util/goroutines/tracker.go
@@ -4,9 +4,9 @@
 package goroutines
 
 import (
+	"sync"
 	"sync/atomic"
 
-	"tailscale.com/syncs"
 	"tailscale.com/util/set"
 )
 
@@ -15,7 +15,7 @@ type Tracker struct {
 	started atomic.Int64 // counter
 	running atomic.Int64 // gauge
 
-	mu     syncs.Mutex
+	mu     sync.Mutex
 	onDone set.HandleSet[func()]
 }