s390/jump label,nss: let shared kernel support depend on !JUMP_LABEL

We can have either shared kernel or jump label support, but not both.
If a kernel gets IPL'ed from an NSS it's not possible to patch the
text segment, since it's read-only.
Therefore any static branches cannot be updated. So we need to make
sure that shared kernel support is disabled if jump label support
is enabled.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index e601340f277a..95303f6a6f53 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -545,8 +545,8 @@ config PFAULT
           this option.
 
 config SHARED_KERNEL
-        def_bool y
-        prompt "VM shared kernel support"
+        bool "VM shared kernel support"
+        depends on !JUMP_LABEL
         help
           Select this option, if you want to share the text segment of the
           Linux kernel between different VM guests. This reduces memory