---
title: vfs_isupdate
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.4+]
path: kernel/1523536-vfs_isupdate
---

# vfs_isupdate

Determine if a mount update is in progress.

## Declaration

```occ
int vfs_isupdate(mount_t mp);
```

## Parameters

- `mp`: Mount to test.

## Return Value

Return Value Nonzero if a mount update is in progress, 0 otherwise.