1 files changed, 5 insertions, 4 deletions

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index f0cf5d990794..51c821477951 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -5,14 +5,15 @@ config TRACE_IRQFLAGS_SUPPORT
 
 source "lib/Kconfig.debug"
 
-config PROMISC_DEVMEM
-        bool "Allow unlimited access to /dev/mem"
-        default y
+config STRICT_DEVMEM
+        bool "Filter access to /dev/mem"
         help
           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.