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

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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>
This commit is contained in:
Heiko Carstens 2012-09-25 14:53:15 +02:00 committed by Martin Schwidefsky
parent f7ed68a47f
commit 0eccc783d8
1 changed files with 2 additions and 2 deletions
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4
arch/s390/Kconfig
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@ -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