1 files changed, 5 insertions, 3 deletions

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index ffd5913b35d1..85a87d2ac0c0 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.