Re: [PATCH 3/4] uacce: implement mremap in uacce_vm_ops to return -EPERM

[Greg KH]

On Fri, Aug 22, 2025 at 06:39:03PM +0800, Chenghai Huang wrote:
> From: Yang Shen <shenyang39@xxxxxxxxxx>
> 
> The current uacce_vm_ops does not support the mremap operation of
> vm_operations_struct. Implement .mremap to return -EPERM to remind
> users

Why is this needed?  If mremap is not set, what is the value returned?

And why is -EPERM the correct value to return here?  That's not what the
man pages say is valid :(

thanks,

greg k-h