On Fri, 2019-09-27 at 11:46 -0300, Leonardo Bras wrote:

I am not sure if it would be ok to use irq_{save,restore} in real mode,
I will do some more reading of the docs before addressing this. 

It looks like it's unsafe to merge irq_{save,restore} in
{start,end}_lockless_pgtbl_walk(), due to a possible access of code
that is not accessible in real mode.

I am sending a v4 for the changes so far.
I will look forward for your feedback.