X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=arch%2FKconfig;h=5f8a5d84dbbe9257f0a2a33c3ed81687a4eb0aad;hb=2ef459167adb5d7cf76df403b4fcf79347056824;hp=0fcf8ec1e09883a2fbab69f02f02068dd913afc3;hpb=56c631f5aec35117b0b5862a09a447a72dfbd678;p=linux.git

diff --git a/arch/Kconfig b/arch/Kconfig
index 0fcf8ec1e098..5f8a5d84dbbe 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -706,6 +706,17 @@ config HAVE_ARCH_COMPAT_MMAP_BASES
 	  and vice-versa 32-bit applications to call 64-bit mmap().
 	  Required for applications doing different bitness syscalls.
 
+# This allows to use a set of generic functions to determine mmap base
+# address by giving priority to top-down scheme only if the process
+# is not in legacy mode (compat task, unlimited stack size or
+# sysctl_legacy_va_layout).
+# Architecture that selects this option can provide its own version of:
+# - STACK_RND_MASK
+config ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
+	bool
+	depends on MMU
+	select ARCH_HAS_ELF_RANDOMIZE
+
 config HAVE_COPY_THREAD_TLS
 	bool
 	help