From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Date: Fri, 15 Mar 2013 10:21:41 -0700 > Adding linux-arch. Guys, can you check your architectures? ... >> * sparc: access_ok missing in get_user_pages_fast, >> -> no indication of any _PAGE_USER flag. Well, access_ok() returns 1 unconditionally on sparc64. I can add a call there if you want. :-) And that's because the user virtual address space is %100 segregated from the privileged one. There are no "user address ranges" vs. kernel ones. For example, we can and do give 64-bit processes the full 64-bit virtual address space for user mappings. The page tables, outside of swapper_pg_dir, only map user pages. -- 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
