tree 2dcbe253cf463eca3c0dfcc9ee8ac7b97cfa5021
parent d54cddb620fa493968111f479029dcd910fcb921
author Jan Glauber <jang@linux.vnet.ibm.com> 1300205302 +0100
committer Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> 1300205303 +0100

[S390] Write protect module text and RO data

Implement write protection for kernel modules text and read-only
data sections by implementing set_memory_[ro|rw] on s390.
Since s390 has no execute bit in the pte's NX is not supported.

set_memory_[ro|rw] will only work on normal pages and not on
large pages, so in case a large page should be modified bail
out with a warning.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>