Instead of open coding a page table walk multiple times, use a generic
page table walker instead.

This new page table walker will be used later for kexec support, too.

Changes in V2:
- addressed comments

Juergen Gross (3):
  mini-os: mm: introduce generic page table walk function
  mini-os: mm: switch need_pgt() to use walk_pt()
  mini-os: mm: convert set_readonly() to use walk_pt()

 arch/x86/mm.c | 353 +++++++++++++++++++++++++++++---------------------
 1 file changed, 204 insertions(+), 149 deletions(-)

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2.43.0