From: Matthew Wilcox <willy@xxxxxxxxxxxxxxx> Date: Fri, 27 Dec 2013 13:00:18 -0500 > It seems to me that while (for example) on SPARC, it's not possible to > create a non-coherent mapping with mmap(), after we've done an mmap, > we can then use remap_file_pages() to create a mapping that no longer > aliases in the D-cache. > > I have only compile-tested this patch. I don't have any SPARC hardware, > and my PA-RISC hardware hasn't been turned on in six years ... I noticed > this while wandering around looking at some other stuff. I suppose this is needed, but only in the case where the mapping is shared and writable, right? I don't see you testing those conditions, but with them I'd be OK with this change.
