Re: [PATCH 2/2] powerpc/strict_rwx: fixup region splitting

On Wed, 04 Oct 2017 22:14:17 +1100
Michael Ellerman [off-list ref] wrote:

Balbir Singh [off-list ref] writes:

quoted

We were aggressive with splitting regions and missed the case
when _stext and __init_begin completely overlap addr and addr+mapping.

This patch fixes that case and allows us to keep the largest possible
mapping through the overlap. The patch also simplies the check
into a function  

Please do the fix in one patch, which we can backport if necessary, and
then move it into a function in a separate patch.

I've tried for a while now, although this looks like its touching more
code, this is more elegant. Anything else involves changing the two
if conditions almost identically.

Balbir Singh.