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(parent: c214be9) | patch
s390/maccess: add no DAT mode to kernel_write
authorVasily Gorbik <gor@linux.ibm.com>
Wed, 24 Jun 2020 15:39:14 +0000 (17:39 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 11 Mar 2023 15:26:55 +0000 (16:26 +0100)
commitdaa3b3a991fbe47544cb565a4d396b3e22d637e9
tree47316082478276be2de922bbf51f7f0e074bddfdtree | snapshot
parentc214be981ec9815ee0010910cd94e64fb3214a65commit | diff
s390/maccess: add no DAT mode to kernel_write

commit d6df52e9996dcc2062c3d9c9123288468bb95b52 upstream.

To be able to patch kernel code before paging is initialized do plain
memcpy if DAT is off. This is required to enable early jump label
initialization.

Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/s390/mm/maccess.c diff | blob | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git