commit 305b1523250faf9675919def94906775992ce52d
author Jan Glauber <jang@linux.vnet.ibm.com> Tue Mar 15 17:08:22 2011 +0100
committer Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> Tue Mar 15 17:08:23 2011 +0100
tree 2dcbe253cf463eca3c0dfcc9ee8ac7b97cfa5021
parent d54cddb620fa493968111f479029dcd910fcb921

[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>

arch/s390/Kconfig.debug

diff --git a/arch/s390/Kconfig.debug b/arch/s390/Kconfig.debug
index 2b380df..d76cef3 100644
--- a/arch/s390/Kconfig.debug
+++ b/arch/s390/Kconfig.debug
@@ -31,4 +31,7 @@
 
 	  If unsure, or if you run an older (pre 4.4) gcc, say N.
 
+config DEBUG_SET_MODULE_RONX
+	def_bool y
+	depends on MODULES
 endmenu