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-rw-r--r--mm/Kconfig7
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index ae1f151c2924..068ce591a13a 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -109,6 +109,13 @@ config NUMA_KEEP_MEMINFO
config MEMORY_ISOLATION
bool
+# IORESOURCE_SYSTEM_RAM regions in the kernel resource tree that are marked
+# IORESOURCE_EXCLUSIVE cannot be mapped to user space, for example, via
+# /dev/mem.
+config EXCLUSIVE_SYSTEM_RAM
+ def_bool y
+ depends on !DEVMEM || STRICT_DEVMEM
+
#
# Only be set on architectures that have completely implemented memory hotplug
# feature. If you are not sure, don't touch it.