On Fri, 26 Feb 2010, Catalin Marinas wrote: > For mmap'ed pages (and present in the page cache), is it guaranteed that > the HCD driver won't write to it once it has been mapped into user > space? If that's the case, it may solve the problem by just reversing > the meaning of PG_arch_1 on ARM and assume that a newly allocated page > has dirty D-cache by default. Nothing is guaranteed. The HCD will write to wherever it is asked. If a driver does input to an mmap'ed page, the HCD won't even know that the page is mmap'ed. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
