On 02/23/2017 02:02 PM, Shanker Donthineni wrote:Why do you want keep 'pre_ttbr0_update_workaround' in subject, nothing wrong with macro definition itself. Problem with the caller, not passing the right arguments.
The commit 38fd94b0275c 'arm64: Work around Falkor erratum 1003' has
been added to fix the hardware bug but causing a system crash. The
value of the register x1 which contains 'struct mm_struct *' should
be preserved inside macro pre_ttbr0_update_workaround.
The subject line seems a bit vague and alarmist to me. In my opinion, this is more descriptive:
arm64: qcom: pre_ttbr0_update_workaround should not clobber register x1