tree 033759c49f3159e9514e8b08282e41977477064c
parent 378b1e7a80a59325ca1036e892462db728126f84
author Heiko Carstens <heiko.carstens@de.ibm.com> 1349101126 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1349785017 +0200

s390/mm,pageattr: add more page table walk sanity checks

The current page table walk code in pageattr.c only checks for large pages
while walking the kernel page table, but happily assumes that everything
else is just fine.
Add more checks so we never access invalid memory regions.

Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>