On Thu, Mar 30, 2017 at 02:32:12PM +0200, Martin Schwidefsky wrote: > On Wed, 29 Mar 2017 06:57:06 +0100 > Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote: > > > The patchset currently in vfs.git#work.uaccess is the result; > > there's more work to do, but it takes care of a large part of the > > problems. About 2.8KLoc removed, a lot of cruft is gone and semantics > > is hopefully in sync now. All but two architectures (ia64 and metag) > > had been switched to new mechanism; for these two I'm afraid that I'll > > need serious help from maintainers. > > I have tested the code in vfs.git#work.uaccess and in principle it works > for s390. I found one bug which would return an incorrect result > for copy_from_user if the access faults on the last page of the copy. > In that case the new code would return 0 instead of the remaining bytes. > > This patch snippet should fix it, please just merge it into commit > "s390: get rid of zeroing, switch to RAW_COPY_USER" Done.
