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-rw-r--r--arch/x86/Kconfig.debug11
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index ae36bfa814e..85a87d2ac0c 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -5,13 +5,15 @@ config TRACE_IRQFLAGS_SUPPORT
source "lib/Kconfig.debug"
-config NONPROMISC_DEVMEM
+config STRICT_DEVMEM
bool "Filter access to /dev/mem"
help
- If this option is left off, you allow userspace access to all
+ If this option is left on, 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.
+ be used by people debugging the kernel. Note that with PAT support
+ enabled, even in this case there are restrictions on /dev/mem
+ use due to the cache aliasing requirements.
If this option is switched on, the /dev/mem file only allows
userspace access to PCI space and the BIOS code and data regions.
@@ -287,7 +289,6 @@ config CPA_DEBUG
config OPTIMIZE_INLINING
bool "Allow gcc to uninline functions marked 'inline'"
- depends on BROKEN
help
This option determines if the kernel forces gcc to inline the functions
developers have marked 'inline'. Doing so takes away freedom from gcc to
@@ -298,5 +299,7 @@ config OPTIMIZE_INLINING
become the default in the future, until then this option is there to
test gcc for this.
+ If unsure, say N.
+
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