tree 622e2232d7ccb3ceba765051ecb9895fa068125f
parent f3d0a0d96a7a2b4e1335437f68b3181ab252050a
author Heiko Carstens <heiko.carstens@de.ibm.com> 1244795201 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1244795257 +0200

[S390] maccess: add weak attribute to probe_kernel_write

probe_kernel_write() gets used to write to the kernel address space.
E.g. to patch the kernel (kgdb, ftrace, kprobes...). Some architectures
however enable write protection for the kernel text section, so that
writes to this region would fault.
This patch allows to specify an architecture specific version of
probe_kernel_write() which allows to handle and bypass write protection
of the text segment.
That way it is still possible to catch random writes to kernel text
and explicitly allow writes via this interface.

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