fix: fix type issue

Author: Rouzip

perf/collector_libpfm.go

@@ -62,16 +62,16 @@ type group struct {
 
 var (
 	isLibpfmInitialized = false
-	libpmfMutex         = sync.Mutex{}
+	libpfmMutex         = sync.Mutex{}
 )
 
 const (
 	groupLeaderFileDescriptor = -1
 )
 
 func init() {
-	libpmfMutex.Lock()
-	defer libpmfMutex.Unlock()
+	libpfmMutex.Lock()
+	defer libpfmMutex.Unlock()
 	pErr := C.pfm_initialize()
 	if pErr != C.PFM_SUCCESS {
 		klog.Errorf("unable to initialize libpfm: %d", int(pErr))
@@ -411,8 +411,8 @@ func (c *collector) Destroy() {
 
 // Finalize terminates libpfm4 to free resources.
 func Finalize() {
-	libpmfMutex.Lock()
-	defer libpmfMutex.Unlock()
+	libpfmMutex.Lock()
+	defer libpfmMutex.Unlock()
 
 	klog.V(1).Info("Attempting to terminate libpfm4")
 	if !isLibpfmInitialized {