On Sun, Jul 26, 2015 at 10:49:39AM -0700, Dan Williams wrote: > On Sun, Jul 26, 2015 at 10:25 AM, Christoph Hellwig <hch@xxxxxx> wrote: > > On Fri, Jul 24, 2015 at 10:38:42PM -0400, Dan Williams wrote: > >> The behavior change to return NULL on an unsupported request is reserved > >> for a later patch. > > > > Why? > > This is for drivers like pmem that care about the mapping type. For > example, if pmem can't get a cache-enabled mapping it is potentially > putting the write durability of the persistent media at risk. I understand that part, but the question is why the old behavior is retained for now and only changed later. -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
