tree 35ef859d3afae3d73c0cb92c1dbd7cb79227deb3
parent 3a7452b4449d34f2eec377e45036f5e0808aff09
author Helge Deller <deller@gmx.de> 1372507394 +0200
committer Helge Deller <deller@gmx.de> 1383859754 +0100

parisc: implement full version of access_ok()

Up to now PA-RISC could live with a trivial version of access_ok().
Our fault handlers can correctly handle fault cases.

But testcases showed that we need a better access check else we won't
always return correct errno failure codes to userspace.

Problem showed up during 32bit userspace tests in which writev() used a
32bit memory area and length which would then wrap around on 64bit
kernel.

Signed-off-by: Helge Deller <deller@gmx.de>