um: enable VMAP_STACK

This works just fine, so select HAVE_ARCH_VMAP_STACK to
let users enable VMAP_STACK if desired.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 0561b73..389c9f5 100644 (file)
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -21,6 +21,7 @@ config UML
        select HAVE_GCC_PLUGINS
        select SET_FS
        select TTY # Needed for line.c
+       select HAVE_ARCH_VMAP_STACK
 
 config MMU
        bool