X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=arch%2FKconfig;h=98f64ad1caf1817e5535a223f84412422c20c1ed;hb=f0ef2ed2d5b309a989cfb42bfef4c3d3686579c7;hp=31a318a56d98ff6d74c672c906a711d024abb8db;hpb=9fe9bdd75b2ad9ed25152fce02f41fe63c542e8a;p=firefly-linux-kernel-4.4.55.git

diff --git a/arch/Kconfig b/arch/Kconfig
index 31a318a56d98..98f64ad1caf1 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -423,6 +423,15 @@ config CC_STACKPROTECTOR_STRONG
 
 endchoice
 
+config HAVE_ARCH_WITHIN_STACK_FRAMES
+	bool
+	help
+	  An architecture should select this if it can walk the kernel stack
+	  frames to determine if an object is part of either the arguments
+	  or local variables (i.e. that it excludes saved return addresses,
+	  and similar) by implementing an inline arch_within_stack_frames(),
+	  which is used by CONFIG_HARDENED_USERCOPY.
+
 config HAVE_CONTEXT_TRACKING
 	bool
 	help