commit 4ceb5db9757aaeadcf8fbbf97d76bd42aa4df0d6 Author: Linus Torvalds <torvalds@g5.osdl.org> Date: Mon Aug 1 11:14:49 2005 -0700 Fix get_user_pages() race for write access There's no real guarantee that handle_mm_fault() will always be able to break a COW situation - if an update from another thread ends up modifying the page table some way, handle_mm_fault() may end up requiring us to re-try the