On Fri, Nov 29, 2024 at 03:31:34PM +0000, Lorenzo Stoakes wrote: > While it is not ideal to use a VM_PFNMAP here, doing anything else will > result in the page_mkwrite() hook need to be provided, which requires the > same page->mapping hack this patch seeks to undo. Or we could map the first page read-write to begin with ... ? Or we could implement a page_mkwrite handler, but do the permissions change in the driver and return VM_FAULT_NOPAGE. I don't think we should do the second option in this driver, but mentioning it because we're going to need to have A Talk about fb_defio.
