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| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2012-09-25 14:53:15 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-09-26 15:45:29 +0200 |
| commit | 0eccc783d85f5edd28497c1f1a62faba392b04eb (patch) | |
| tree | 62ca191b4a1461d4885533c252e40b8c4cdbb9e8 /arch/s390/Kconfig | |
| parent | s390/disassembler: fix decoding of risblg instruction (diff) | |
| download | linux-dev-0eccc783d85f5edd28497c1f1a62faba392b04eb.tar.xz linux-dev-0eccc783d85f5edd28497c1f1a62faba392b04eb.zip | |
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>
Diffstat (limited to 'arch/s390/Kconfig')
| -rw-r--r-- | arch/s390/Kconfig | 4 |
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 |