s390/jump label,nss: let shared kernel support depend on !JUMP_LABEL
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Tue, 25 Sep 2012 12:53:15 +0000 (14:53 +0200)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Wed, 26 Sep 2012 13:45:29 +0000 (15:45 +0200)
commit0eccc783d85f5edd28497c1f1a62faba392b04eb
tree62ca191b4a1461d4885533c252e40b8c4cdbb9e8
parentf7ed68a47fa8da76c0e92ae72e0a1a04dbb4566d
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>
arch/s390/Kconfig