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authorRussell King <rmk+kernel@arm.linux.org.uk>2010-10-19 22:06:36 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-10-19 22:06:36 +0100
commit809b4e00baf006a990a73329ba381d536c6fa277 (patch)
treee949e0efd019d6f932537aba762792b07a84351c /arch/arm/Kconfig.debug
parenta0a55682b83fd5f012afadcf415b030d7424ae68 (diff)
parent79a94c3538bda6869d7bb150b5e02dd3a72314dd (diff)
Merge branch 'devel-stable' into devel
Diffstat (limited to 'arch/arm/Kconfig.debug')
-rw-r--r--arch/arm/Kconfig.debug14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 4dbce538fec..2fd0b99afc4 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -2,6 +2,20 @@ menu "Kernel hacking"
source "lib/Kconfig.debug"
+config STRICT_DEVMEM
+ bool "Filter access to /dev/mem"
+ depends on MMU
+ ---help---
+ If this option is disabled, you allow userspace (root) access to all
+ of memory, including kernel and userspace memory. Accidental
+ access to this is obviously disastrous, but specific access can
+ be used by people debugging the kernel.
+
+ If this option is switched on, the /dev/mem file only allows
+ userspace access to memory mapped peripherals.
+
+ If in doubt, say Y.
+
# RMK wants arm kernels compiled with frame pointers or stack unwinding.
# If you know what you are doing and are willing to live without stack
# traces, you can get a slightly smaller kernel by setting this option to