Merge branches 'x86/urgent', 'x86/amd-iommu', 'x86/apic', 'x86/cleanups', 'x86/core...

[linux-2.6-omap-h63xx.git] / arch / x86 / Kconfig.debug

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index ffd5913b35d16f57307cd9f9f50a19c82c06d5cc..85a87d2ac0c09940c9d0d6654345375417e3d378 100644 (file)
--- 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.