On Thu, May 28, 2020 at 07:40:43AM +0200, Christoph Hellwig wrote: > If we read to a file that implements ->read_iter there is no need > to change the address limit if we send a kvec down. Implement that > case, and prefer it over using plain ->read with a changed address > limit if available. Ditto re never converting something that bails out on uaccess_kernel() in ->read() over to ->read_iter().
