commit 985c30ef4d7c2a4f0e979a507a7e2f7f09b096c3
author Ralf Baechle <ralf@linux-mips.org> Mon Oct 15 16:30:24 2007 +0100
committer Ralf Baechle <ralf@linux-mips.org> Tue Oct 16 18:23:49 2007 +0100
tree 8f5a447adaa49b6efb7485e8b69b2743eca3ee4b
parent 736fad17b89e5e718908abb76ae9bce210a9d5d4

[MIPS] Fix aliasing bug in copy_user_highpage, take 2.

Turns out b868868ae0f7272228c95cc760338ffe35bb739d  wasn't quite right.
When called for a page that isn't marked dirty it would artificially
create an alias instead of doing the obvious thing and access the page
via KSEG0.

The same issue also exists in copy_to_user_page and copy_from_user_page
which was causing the machine to die under rare circumstances for example
when running ps if the BUG_ON() assertion added by the earlier fix was
getting triggered.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>