Kees Cook mentioned that it is a good idea to assert the PAN state
during disable/enable. Since, with this change everything is moved to
the same C place, if this hardening is something others also want to
see, I could add it in the next revision of this series. Here are the
options to choose from:
Changelog
v2:
- Addressed Russell King's concern by not adding
uaccess_* to ARM.
- Removed the accidental change to xtensa
Convert the remaining uaccess_* calls from ASM macros to C inlines.
These patches apply against linux-next. I boot tested ARM64, and
compile tested
