kubernetes/vendor/github.com/opencontainers/selinux/pkg/pwalkdir/pwalkdir.go

// Walk is a wrapper for filepath.WalkDir which can call multiple walkFn
// in parallel, allowing to handle each item concurrently. A maximum of
// twice the runtime.NumCPU() walkFn will be called at any one time.
// If you want to change the maximum, use WalkN instead.
//
// The order of calls is non-deterministic.
//
// Note that this implementation only supports primitive error handling:
//
// - no errors are ever passed to walkFn;
//
// - once a walkFn returns any error, all further processing stops
// and the error is returned to the caller of Walk;
//
// - filepath.SkipDir is not supported;
//
// - if more than one walkFn instance will return an error, only one
// of such errors will be propagated and returned by Walk, others
// will be silently discarded.
func Walk(root string, walkFn fs.WalkDirFunc) error { … }

// WalkN is a wrapper for filepath.WalkDir which can call multiple walkFn
// in parallel, allowing to handle each item concurrently. A maximum of
// num walkFn will be called at any one time.
//
// Please see Walk documentation for caveats of using this function.
func WalkN(root string, walkFn fs.WalkDirFunc, num int) error { … }

type walkArgs …