[PATCH 4.14 109/195] NFS: Fix a race between mmap() and O_DIRECT

4.14-stable review patch. If anyone has any objections, please let me know. -- From: Trond Myklebust commit e231c6879cfd44e4fffd384bb6dd7d313249a523 upstream. When locking the file in order to do O_DIRECT on it, we must unmap any mmapped

[PATCH 4.14 109/195] NFS: Fix a race between mmap() and O_DIRECT

4.14-stable review patch. If anyone has any objections, please let me know. -- From: Trond Myklebust commit e231c6879cfd44e4fffd384bb6dd7d313249a523 upstream. When locking the file in order to do O_DIRECT on it, we must unmap any mmapped ranges on the pagecache so that we can