Hi, while using fuse 2.x and nonempty mount option - fuse mounts breaks after upgrading from kernel 4.19 to 5.4. While everything works fine under 4.19 - a mount on kernel 5.4 gives me the following kernel message and an unmountable fuse mount: [ 201.289586] fuse: Unknown parameter 'nonempty' While nonempty is clearly a fuse 2.x mount option, which should be handled in userspace it seems it is passed to the kernel and older kernels just ignored it. It might be that those reworks have caused this: commit 9bc61ab18b1d41f26dc06b9e6d3c203e65f83fe6 Author: David Howells <dhowells@xxxxxxxxxx> Date: Sun Nov 4 03:19:03 2018 -0500 vfs: Introduce fs_context, switch vfs_kern_mount() to it. ... commit c7eb6869632a5d33b41d0a00d683b8395392b7ee Author: David Howells <dhowells@xxxxxxxxxx> Date: Mon Mar 25 16:38:31 2019 +0000 vfs: subtype handling moved to fuse Can anybody help? Greets, Stefan