s390: remove small stack config option

We've seen repeatedly that 8KB stack size on 64 bit kernels
is not sufficient.
So simply remove the config option.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 0 insertions, 13 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index eb8fb629f00b..bda6ba6f3cf5 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -375,19 +375,6 @@ config PACK_STACK
 
           Say Y if you are unsure.
 
-config SMALL_STACK
-        def_bool n
-        prompt "Use 8kb for kernel stack instead of 16kb"
-        depends on PACK_STACK && 64BIT && !LOCKDEP
-        help
-          If you say Y here and the compiler supports the -mkernel-backchain
-          option the kernel will use a smaller kernel stack size. The reduced
-          size is 8kb instead of 16kb. This allows to run more threads on a
-          system and reduces the pressure on the memory management for higher
-          order page allocations.
-
-          Say N if you are unsure.
-
 config CHECK_STACK
         def_bool y
         prompt "Detect kernel stack overflow"