On Fri, Aug 27, 2021 at 06:49:12PM +0200, Andreas Gruenbacher wrote: > Introduce a new fault_in_iov_iter_writeable helper for safely faulting > in an iterator for writing. Uses get_user_pages() to fault in the pages > without actually writing to them, which would be destructive. > > We'll use fault_in_iov_iter_writeable in gfs2 once we've determined that > the iterator passed to .read_iter isn't in memory. Again, the calling conventions are wrong. Make it success/failure or 0/-EFAULT. And it's inconsistent for iovec and non-iovec cases as it is.
