MSM implements CONFIG_RWX and disallows the kernel text to be written.
However, in cases where we temporarily need to write the kernel text,
we explicitly mark it writeable for a short period of time.
Change-Id: I532b663a9bd0115ea5e7177e9dac4ac54e007725
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
Extract out the code patching code from kprobes so that it can be used
from the jump label code. Additionally, the separated code:
- Uses the IS_ENABLED() macros instead of the #ifdefs for THUMB2
support
- Unifies the two separate functions in kprobes, providing one function
that uses stop_machine() internally, and one that can be called from
stop_machine() directly
- Patches the text on all CPUs only on processors requiring software
broadcasting of cache operations
Acked-by: Jon Medhurst <tixy@yxit.co.uk>
Tested-by: Jon Medhurst <tixy@yxit.co.uk>
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
