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

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Turns out b868868ae0  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>

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This commit is contained in:

Ralf Baechle 2007-10-15 16:30:24 +01:00

parent 736fad17b8

commit 985c30ef4d

1 changed files with 12 additions and 7 deletions

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arch/mips/mm/init.c

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