Hi Michael

On 18/06/24 12:41, Michael Ellerman wrote:

I guess there isn't a kmem_cache_create_user_readonly() ?

Thank you for your review.                                                    
My understanding of the question is whether there's a way to whitelist a   
region such that it can be copied to userspace, but not written to using   
copy_from_user().                                                             
No, we don't have a function to whitelist only for copy_to_user() and not  
copy_from_user().

Thank you
Anjali K