On Tue, Apr 21, 2020 at 03:26:00PM +0100, Catalin Marinas wrote: > While this function is not on a critical path, the single-pass behaviour > is required for arm64 MTE (memory tagging) support where a uaccess can > trigger intra-page faults (tag not matching). With the current > implementation, if this happens during the first page, the function will > return -EFAULT. Details, please.